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【327877】2023年四川省成都市数学中考真题

时间:2025-01-20 20:33:24 作者: 字数:26973字
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2023年四川省成都市数学中考真题

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一、选择题

1. <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 四个数中,最大的数是(       
A
3
B
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
C
0
D
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

2.20235171049分,我国在西昌卫星发射中心成功发射第五十六颗北斗导航卫星.北斗系统作为国家重要基础设施,深刻改变着人们的生产生活方式.目前,某地图软件调用的北斗卫星日定位量超 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 亿次.将数据 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 亿用科学记数法表示为(       
A
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
B
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
C
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
D
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

3.下列计算正确的是(       
A
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
B
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
C
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
D
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

4.近年来,随着环境治理的不断深入,成都已构建起“青山绿道蓝网”生态格局.如今空气质量越来越好,杜甫那句“窗含西岭千秋雪”已成为市民阳台外一道靓丽的风景.下面是成都市今年三月份某五天的空气质量指数( <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ): <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则这组数据的中位数是(       
A
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
B
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
C
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
D
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

5.如图,在 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中,对角线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 相交于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则下列结论一定正确的是(       
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
A <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
B
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
C
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
D
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

6.为贯彻教育部《大中小学劳动教育指导纲要(试行)》文件精神,某学校积极开设种植类劳动教育课.某班决定每位学生随机抽取一张卡片来确定自己的种植项目,老师提供6张背面完全相同的卡片,其中蔬菜类有4张,正面分别印有白菜、辣椒、豇豆、茄子图案;水果类有2张,正面分别印有草莓、西瓜图案,每个图案对应该种植项目.把这6张卡片背面朝上洗匀,小明随机抽取一张,他恰好抽中水果类卡片的概率是(       
A
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
B
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
C
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
D
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

7.《孙子算经》是中国古代重要的数学著作,是《算经十书》之一.书中记载了这样一个题目:今有木,不知长短.引绳度之,余绳四尺五寸;屈绳量之,不足一尺.木长几何?其大意是:用一根绳子去量一根长木,绳子还剩余 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 尺;将绳子对折再量长木,长木还剩余 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 尺.问木长多少尺?设木长 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 尺,则可列方程为(       
A
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
B
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
C
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
D
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

8.如图,二次函数 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的图象与x轴交于 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 两点,下列说法正确的是(       
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
A.抛物线的对称轴为直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
B
.抛物线的顶点坐标为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
C
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 两点之间的距离为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
D
.当 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的值随 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 值的增大而增大

评卷人

得分




二、填空题

9.因式分解:m2﹣3m__________

10.若点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 都在反比例函数 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的图象上,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> _______ <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (填“ <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ”或“ <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ”).

11.如图,已知 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,点BECF依次在同一条直线上.若 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的长为___________
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    

12.在平面直角坐标系 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中,点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 关于y轴对称的点的坐标是___________

13.如图,在 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 是边 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 上一点,按以下步骤作图:①以点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 为圆心,以适当长为半径作弧,分别交 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ;②以点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 为圆心,以 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 长为半径作弧,交 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ;③以点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 为圆心,以 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 长为半径作弧,在 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 内部交前面的弧于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> :④过点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 作射线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> .若 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 与四边形 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的面积比为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的值为___________
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    

14. <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则代数式 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,的值为___________

15.一个几何体由几个大小相同的小立方块搭成,它的主视图和俯视图如图所示,则搭成这个几何体的小立方块最多有___________个.
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    

16.为传承非遗文化,讲好中国故事,某地准备在一个场馆进行川剧演出.该场馆底面为一个圆形,如图所示,其半径是10米,从AB有一笔直的栏杆,圆心O到栏杆 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的距离是5米,观众在阴影区域里观看演出,如果每平方米可以坐3名观众,那么最多可容纳___________名观众同时观看演出.( <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 3.14 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 1.73
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    

17.如图,在 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 平分 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,过 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,将 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 沿 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 折叠得到 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> .若 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> __________
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    

18.定义:如果一个正整数能表示为两个正整数 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的平方差,且 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则称这个正整数为“智慧优数”.例如, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 16就是一个智慧优数,可以利用 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 进行研究.若将智慧优数从小到大排列,则第3个智慧优数是________;第23个智慧优数是________

评卷人

得分




三、解答题

19.1)计算: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
2)解不等式组: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

20.文明是一座城市的名片,更是一座城市的底蕴.成都市某学校于细微处着眼,于贴心处落地,积极组织师生参加“创建全国文明典范城市志愿者服务”活动,其服务项目有“清洁卫生”“敬老服务”“文明宣传”“交通劝导”,每名参加志愿者服务的师生只参加其中一项.为了解各项目参与情况,该校随机调查了参加志愿者服务的部分师生,将调查结果绘制成如下两幅不完整的统计图.
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
根据统计图信息,解答下列问题:
(1)
本次调查的师生共有___________人,请补全条形统计图;
(2)
在扇形统计图中,求“敬老服务”对应的圆心角度数:
(3)
该校共有1500名师生,若有 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的师生参加志愿者服务,请你估计参加“文明宣传”项目的师生人数.

21.为建设美好公园社区,增强民众生活幸福感,某社区服务中心在文化活动室墙外安装避阳篷,便于社区居民休憩.如图,在侧面示意图中,遮阳篷 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 长为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 米,与水平面的夹角为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,且靠墙端离地高 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 米,当太阳光线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 与地面 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的夹角为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时,求阴影 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的长.(结果精确到 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 米;参考数据: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>        

22.如图,以 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的边 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 为直径作 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,交 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 边于点D,过点C <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点E,连接 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
(1)求证: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
(2)
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,求 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的长.

23.如图,在平面直角坐标系 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中,直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> y轴交于点A,与反比例函数 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的图象的一个交点为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,过点BAB的垂线l
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
(1)求点A的坐标及反比例函数的表达式;
(2)
若点C在直线l上,且 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的面积为5,求点C的坐标;
(3)
P是直线l上一点,连接PA,以P为位似中心画 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,使它与 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 位似,相似比为m.若点DE恰好都落在反比例函数图象上,求点P的坐标及m的值.

24. <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 日至 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 日,第 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 届世界大学生运动会将在成都举行.“当好东道主,热情迎嘉宾”,成都某知名小吃店计划购买 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 两种食材制作小吃.已知购买 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 千克 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材和 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 千克 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材共需 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 元,购买 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 千克 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材和 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 千克 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材共需 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 元.
(1)
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 两种食材的单价;
(2)
该小吃店计划购买两种食材共 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 千克,其中购买 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材千克数不少于 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材千克数的 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 倍,当 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 两种食材分别购买多少千克时,总费用最少?并求出最少总费用.

25.如图,在平面直角坐标系 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中,已知抛物线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 经过点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,与y轴交于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 与抛物线交于BC两点.
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>        
(1)求抛物线的函数表达式;
(2)
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 是以 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 为腰的等腰三角形,求点B的坐标;
(3)
过点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> y轴的垂线,交直线AB于点D,交直线AC于点E.试探究:是否存在常数m,使得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 始终成立?若存在,求出m的值;若不存在,请说明理由.

26.探究式学习是新课程倡导的重要学习方式,某兴趣小组拟做以下探究.
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> D <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 边上一点,且 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> n为正整数),E <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 边上的动点,过点D <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的垂线交直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点F
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
(初步感知)
(1)
如图1,当 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时,兴趣小组探究得出结论: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,请写出证明过程.
(
深入探究)
(2)①
如图2,当 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,且点F在线段 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 上时,试探究线段 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 之间的数量关系,请写出结论并证明;
请通过类比、归纳、猜想,探究出线段 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 之间数量关系的一般结论(直接写出结论,不必证明)
(
拓展运用)
(3)
如图3,连接 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,设 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的中点为M.若 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,求点E从点A运动到点C的过程中,点M运动的路径长(用含n的代数式表示).

参考答案

1.A

【解析】
根据有理数大小比较的法则:①正数都大于0;②负数都小于0;③正数大于一切负数;④两个负数,绝对值大的其值反而小,据此判断即可.
解:根据有理数比较大小的方法,可得
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
最大的数是:3
故选:A

2.D

【解析】
用科学记数法表示较大的数时,一般形式为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,其中 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 为整数.
解: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 亿 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
故选:D

3.C

【解析】
分别根据积的乘方、合并同类项、乘法公式逐项求解判断即可.
解:A <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,故原计算错误,不符合题意;
B
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,故原计算错误,不符合题意;
C
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,故原计算正确,符合题意;
D
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,故原计算错误,不符合题意,
故选:C

4.C

【解析】
将这组数据从小到大重新排列,再根据中位数的定义求解即可.
将这组数据从小到大重新排列为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
这组数据的中位数为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
故选:C

5.B

【解析】
根据平行四边形的性质逐项分析判断即可求解.
四边形 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 是平行四边形,对角线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 相交于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
A.
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,不一定成立,故该选项不正确,不符合题意;       
B.  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,故该选项正确,符合题意;
C.
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,不一定成立,故该选项不正确,不符合题意;       
D.  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,不一定成立,故该选项不正确,不符合题意;
故选:B

6.B

【解析】
根据概率公式求解即可.
解:由题意,随机抽取一张,共有6种等可能的结果,其中恰好抽中水果类卡片的有2种,
小明随机抽取一张,他恰好抽中水果类卡片的概率是 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
故选:B

7.A

【解析】
设木长 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 尺,根据题意“用一根绳子去量一根长木,绳子还剩余 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 尺;将绳子对折再量长木,长木还剩余 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 尺”,列出一元一次方程即可求解.
解:设木长 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 尺,根据题意得,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
故选:A

8.C

【解析】
待定系数法求得二次函数解析式,进而逐项分析判断即可求解.
解:∵二次函数 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的图象与x轴交于 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 两点,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
二次函数解析式为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,对称轴为直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,顶点坐标为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,故AB选项不正确,不符合题意;
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,抛物线开口向上,当 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的值随 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 值的增大而减小,故D选项不正确,不符合题意;
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,故C选项正确,符合题意;
故选:C

9. <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

【解析】
题中二项式中各项都含有公因式 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,利用提公因式法因式分解即可得到答案.
解: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
故答案为: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

10. <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

【解析】
根据题意求得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,进而即可求解.
解:∵点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 都在反比例函数 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的图象上,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
故答案为: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

11.3

【解析】
利用平移性质求解即可.
解:由平移性质得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
故答案为:3

12. <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

【解析】
根据关于y轴对称的点,纵坐标相同,横坐标互为相反进行求解即可.
解:在平面直角坐标系 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中,点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 关于y轴对称的点的坐标是 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
故答案为: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> .

13. <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

【解析】
根据作图可得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,然后得出 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,可证明 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,进而根据相似三角形的性质即可求解.
解:根据作图可得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 与四边形 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的面积比为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
故答案为: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

14. <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

【解析】
根据分式的化简法则,将代数式化简可得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,再将 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 变形,即可得到答案.
解: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
故原式的值为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
故答案为: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

15. <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

【解析】
根据主视图和俯视图可得第一列最多2个,第二列最多1个小正方形,即可求解.
解:根据主视图和俯视图可得第一列最多2个,第二列最多1个小正方形,如图所示,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
搭成这个几何体的小立方块最多有 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
故答案为: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

16.184

【解析】
过点O <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的垂线段,交 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,根据直角三角形的边长关系求出 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的角度,阴影面积即为扇形 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的面积减去三角形 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的面积,随机可以求出容纳观众的数量.
解:如图,过点O <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的垂线段,交 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>        
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 圆心O到栏杆 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的距离是5米,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 米,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 米,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 可容纳的观众
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 阴影部分面积 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (人),
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 最多可容纳184名观众同时观看演出,
故答案为:184

17. <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

【解析】
过点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,证明 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,得出 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,根据 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,设 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,在 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,在 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,解方程求得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,勾股定理求得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,根据正切的定义,即可求解.
解:如图所示,过点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 平分 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> , <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
折叠,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,
又∵ <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
解得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
故答案为: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

18.      <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>       <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

【解析】
根据新定义,列举出前几个智慧优数,找到规律,进而即可求解.
解:依题意, 当 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则第1个一个智慧优数为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则第2个智慧优数为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则第3个智慧优数为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则第4个智慧优数为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则第5个智慧优数为  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则第6个智慧优数为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则第7个智慧优数为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
……
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时有4个智慧优数,同理 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时有 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 个, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时有6个,
列表如下,


 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>










 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>










 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>









 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>








 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>







 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>






 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>





 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>




 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>



 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>


 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

观察表格可知当 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时,智慧数为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时,智慧数为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时,智慧数为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时,智慧数为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
1至第10个智慧优数分别为: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
11至第20个智慧优数分别为: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
21个智慧优数 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,第22个智慧优数为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,第23个智慧优数为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
故答案为: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

19.13;(2 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

【解析】
1)先计算算术平方根、特殊角的三角函数值、零指数幂和绝对值,再加减运算即可求解;
2)先求得每个不等式的解集,再求得它们的公共部分即可求解;
解:(1 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
2)解不等式①,得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
解不等式②,得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
不等式组的解集为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

20.(1) <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,图见解析;
(2)
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
(3)
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 人;

【解析】
1)根据“清洁卫生”的人数除以占比即可得出样本的容量,进而求“文明宣传”的人数,补全统计图;
2)根据“敬老服务”的占比乘以 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 即可求解;
3)用样本估计总体,用 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 乘以 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 再乘以“文明宣传”的 比即可求解.
1)解:依题意,本次调查的师生共有 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 人,
∴“
文明宣传”的人数为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (人)
补全统计图,如图所示,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
故答案为: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
2)在扇形统计图中,求“敬老服务”对应的圆心角度数为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
3)估计参加“文明宣传”项目的师生人数为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (人).

21. <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

【解析】
过点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则四边形 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 是矩形,在 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中,求得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,进而求得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,根据 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,即可求解.
解:如图所示,过点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则四边形 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 是矩形,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
依题意,  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (米)
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (米), <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (米),则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (米)
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (米)
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (米)
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (米)
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (米).

22.(1)见解析
(2)
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

【解析】
1)根据 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,得到 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,再根据同弧所对的圆周角相等,得到 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,可证明 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 是等腰三角形,即可解答;
2)根据直径所对的圆周角为直角,得到 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,设 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,根据勾股定理列方程,解得x的值,即可求出 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ;解法一:过点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的垂线段,交 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的延长线于点F,证明 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,求出 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的长,根据勾股定理即可解出 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的长;解法二:连接 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,得到角相等,进而证得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,根据对应边成比例即可解出 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的长.
1)证明: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
2)解:设 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的直径,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,即 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
根据(1)中的结论,可得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
根据勾股定理,可得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,即 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
解得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (舍去),
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,
根据勾股定理,可得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
解法一:如图,过点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的垂线段,交 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的延长线于点F
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,即 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
可得方程 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,解得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
根据勾股定理,可得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
解法二:如图,连接 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

23.(1)A的坐标为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,反比例函数的表达式为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
(2)
C的坐标为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
(3)
P的坐标为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> m的值为3

【解析】
1)利用直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 解析式可的点C的坐标,将点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 代入 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 可得a的值,再将点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 代入反比例函数解析式可得k的值,从而得解;
2)设直线ly轴交于点M,由点B的坐标和直线l <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的垂线先求出点M的坐标,再用待定系数法求直线l的解析式 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> C点坐标为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,根据 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ( <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 分别代表点B与点C的横坐标)可得点C的横坐标,从而得解;
3) 位似图形的对应点与位似中心三点共线可知点B的对应点也在直线l上,不妨设为点E,则点A的对应点是点D,直线l与双曲线的解析式联立方程组得到 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,由 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 得到 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,继而得到直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 与直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的解析式中的一次项系数相等,设直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的解析式是: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,将 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 代入 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 求得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的解析式是: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,再将直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 与双曲线的解析式联立求得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,再用待定系数法求出 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的解析式是 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,利用直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的解析式与直线l的解析式联立求得点P的坐标为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,再用两点间的距离公式得到 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 从而求得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
1)解:令 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
A的坐标为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
将点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 代入 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
解得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
将点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 代入 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
解得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
反比例函数的表达式为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
2)解:设直线ly轴交于点M,直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> x轴得交点为N
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 解得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
又∵ <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
又∵直线l <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的垂线即 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
设直线l得解析式是: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
将点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 代入 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
解得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
直线l的解析式是: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
设点C的坐标是 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ( <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 分别代表点B与点C的横坐标)
解得:  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 6
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
C的坐标为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
3)∵位似图形的对应点与位似中心三点共线,
B的对应点也在直线l上,不妨设为点E,则点A的对应点是点D
E是直线l与双曲线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的另一个交点,
将直线l与双曲线的解析式联立得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
解得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
画出图形如下:
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
又∵ <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 与直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的解析式中的一次项系数相等,
设直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的解析式是: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
将点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 代入 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
解得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的解析式是: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
D也在双曲线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 上,
D是直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 与双曲线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的另一个交点,
将直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 与双曲线的解析式联立得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
解得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
设直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的解析式是: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
将点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 代入 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
解得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的解析式是: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
又将直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的解析式与直线l的解析式联立得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
解得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
P的坐标为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

24.(1) <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材单价是每千克 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 元, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材单价是每千克 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
(2)
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材购买 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 千克, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材购买 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 千克时,总费用最少,为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

【解析】
1)设 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材的单价为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 元, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材的单价为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 元,根据题意列出二元一次方程组,解方程组即可求解;
2)设 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材购买 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 千克,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材购买 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 千克,根据题意列出不等式,得出 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,进而设总费用为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 元,根据题意, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,根据一次函数的性质即可求解.
1)解:设 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材的单价为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 元, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材的单价为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 元,根据题意得,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
解得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
答: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材的单价为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 元, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材的单价为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 元;
2)解:设 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材购买 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 千克,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 种食材购买 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 千克,根据题意,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
解得: <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
设总费用为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 元,根据题意, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的增大而增大,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 最小,
最少总费用为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> (元)

25.(1) <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
(2)
B的坐标为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
(3)
存在,m的值为2 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

【解析】
1)利用待定系数法求解即可;
2)设 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,分 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 两种情况,分别根据等腰三角形性质和两点坐标距离公式列方程求解即可;
3)先根据题意画出图形,设抛物线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 与直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的交点坐标为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,联立抛物线和直线解析式,根据根与系数关系得到 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,利用待定系数法分别求得直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的表达式为得到 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,过E <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 轴于Q,过D <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 轴于N,证明 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 得到 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,整理可得到 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,进而求解即可.
1)解:∵抛物线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 经过点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,与y轴交于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,解得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
抛物线的函数表达式为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
2)解:设 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
根据题意, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 是以 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 为腰的等腰三角形,有两种情况:
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时,点B和点P关于y轴对称,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,∴ <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
整理,得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
解得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
综上,满足题意的点B的坐标为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
3)解:存在常数m,使得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
根据题意,画出图形如下图,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>        
设抛物线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 与直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的交点坐标为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
设直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的表达式为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,解得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的表达式为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,由 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
同理,可得直线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的表达式为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
E <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 轴于Q,过D <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 轴于N
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
整理,得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 代入,得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,则 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
解得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
综上,存在常数m,使得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> m的值为2 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

26.(1)见解析
(2)①
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,证明过程略;②当点F在射线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 上时, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,当点F <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 延长线上时, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
(3)
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>

【解析】
1)连接 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,当 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,即 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,证明 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,从而得到 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 即可解答;
2)①过 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的中点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的平行线,交 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,交 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,当 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,根据 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,可得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 是等腰直角三角形, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,根据(1)中结论可得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,再根据 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,即可得到 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
分类讨论,即当点F在射线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 上时;当点F <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 延长线上时,画出图形,根据①中的原理即可解答;
3)如图,当 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 重合时,取 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的中点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,当 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 重合时,取 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的中点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,可得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的轨迹长度即为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的长度,可利用建系的方法表示出 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的坐标,再利用中点公式求出 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,最后利用勾股定理即可求出 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的长度.
1)证明:如图,连接 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,即 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,即 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 中,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
2)① <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
证明:如图,过 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的中点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的平行线,交 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,交 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 时, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,即 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的中点,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 是等腰直角三角形,且 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
根据(1)中的结论可得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
故线段 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 之间的数量关系为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
解:当点F在射线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 上时,
如图,在 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 上取一点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 使得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,过 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的平行线,交 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,交 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
同①,可得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
同①可得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
即线段 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 之间数量关系为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
当点F <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 延长线上时,
如图,在 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 上取一点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 使得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,过 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的平行线,交 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,交 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,连接 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
同(1)中原理,可证明 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
可得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
同①可得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
即线段 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 之间数量关系为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,
综上所述,当点F在射线 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 上时, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ;当点F <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 延长线上时, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
3)解:如图,当 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 重合时,取 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的中点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,当 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 重合时,取 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的中点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,可得 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的轨迹长度即为 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的长度,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
如图,以点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 为原点, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 轴, <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 轴建立平面直角坐标系,过点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的垂线段,交 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> ,过点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的垂线段,交 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 于点 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>    
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>  <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a> 的中点,
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
根据(2)中的结论 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>
 <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/752/" title="成都" class="c1" target="_blank">成都</a> <a href="/tags/1074/" title="四川省" class="c1" target="_blank">四川省</a> <a href="/tags/1004/" title="四川" class="c1" target="_blank">四川</a>