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【330027】16.1 第1课时 二次根式的概念

时间:2025-02-07 09:18:39 作者: 字数:1249字
  1. 二次根式

16.1 二次根式

1课时 二次根式的概念

1.使二次根式 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 有意义的a的取值范围是(

Aa﹣2 Ba2 Ca2 Da﹣2

2.若代 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 有意义,则 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 的取值范围是(

A <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> B <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> C <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> D <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

3.下列各式中,一定是二次根式的是(

A <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

B <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

C <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

D <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

4.已知实数xy满足 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> ,则以xy的值为两边长的等腰三角形的周长是( )

A2016 B20 C16 D. 以上答案均不对

5.如果a为任意实数, 下列各式中一定有意义的是(

A <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> B <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> C <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> D <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>

6如果二次根式 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 有意义,那么 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 的取值范围是

7.若使式子 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 有意义,则 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 的取值范围是 .

8.大于 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 的最小整数是  <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> .

9.若式子 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 在实数范围内有意义,则x的取值范围是

10.x是怎样的实数时,下列式子在实数范围内有意义?

1 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> ;(2 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a>





11. <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 互为相反数,求 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 的值是多少?








12.已知ABC的三边长abc均为整数,且ab满足 <a href="/tags/16/" title="课时" class="c1" target="_blank">课时</a> <a href="/tags/412/" title="概念" class="c1" target="_blank">概念</a> <a href="/tags/896/" title="根式" class="c1" target="_blank">根式</a> 试求ABCc边的长.