下列等式中,一定成立的是( ).
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2022-03-17 10:59:40
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【推荐1】在下列各数:
,
,
,
,
,
,
,
,
中无理数的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94eecd59161d1a8dadbbef5184a628d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b68e594212cf2a24501a758adfcae885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b15e1ee2b0f7e006225ad9476adb133.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9916bb44a4955627bd6286a20197141f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab46ea0cba2d06283fae3d864a2329e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619096595112f0340a43b756e114dd3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c110c9e9d95d92f2f7de1040f91890c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8397629ac2094389cd991491413535c.png)
A.4 | B.5 | C.6 | D.7 |
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较易
(0.85)
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【推荐2】
与
是同类二次根式,符合条件的a的值可以是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d012d124f04963fb72a68af40d5f8f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
A.12 | B.14 | C.![]() | D.24 |
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