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【330607】第二章 一元一次不等式与一元一次不等式组 周周测3(2.3)

时间:2025-02-11 18:29:24 作者: 字数:5571字

 <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a>

2.3不等式的解集

一、选择题

1.x=-1不是下列哪一个不等式的解(   

A. 2x+1≤-3                            <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a> B. 2x-1≥-3                            <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a> C. -2x+1≥3                            <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a> D. -2x-1≤3

2.今年西安市4月份最低气温4,最高气温33,则西安市该月份气温t)的变化范围是(  )

A. t4                                 <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a> B. t≤33                                 <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a> C. 4t33                                 <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a> D. 4≤t≤33

3.不等式x≥2的解集在数轴上表示为(  

A.  <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a>                                       <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a> B.  <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a>   
C.  <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a>                                <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a> D.  <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a>

4.如果(m+1xm+1的解集为x1,则m的取值范围是(  )

A. m0                             <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a> B. m<﹣1                             <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a> C. m>﹣1                             <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a> D. m是任意实数

5.已知两个不等式的解集在数轴上如图表示,那么这个解集为(  

 <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a>

A. x≥1                               <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a> B. x1                               <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a> C. 3x≤1                               <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a> D. x>﹣3

6.生物兴趣小组在同一温箱里培育甲、乙两种菌种,如果甲菌种生长温度x的范围是34≤x≤37,乙菌种生长温度y的范围是33≤y≤35.那么温箱里应设置温度T的范围是(  )

A. 34≤T≤37                          <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a> B. 34≤T≤35                          <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a> C. 33≤T≤35                          <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a> D. 35≤T≤37

7.已知关于x的不等式2x-a-3的解集如图所示,则a的值等于(    
 <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a>

A. -1                                           B. 0                                           C. 1                                           D. 2.

二、填空题

8.某药品说明书上标明药品保存的温度是(10±4,设该药品合适的保存温度为t,则温度t的范围是________

9.若关于x的不等式3m+x5的解集是x2,则m的值是________ 

10.关于x的不等式2xa≤1的解集如图所示,则a的值是 ________
 <a href="/tags/165/" title="等式" class="c1" target="_blank">等式</a> <a href="/tags/844/" title="不等式" class="c1" target="_blank">不等式</a>



答案:

1.A 2.D 3.C 4.B 5.A 6.B 7.C 8.6t14 9.1 10.-1