若x,y为实数,且
,则
的值是( )
![](https://img.xkw.com/dksih/QBM/2013/5/30/1573658544758784/1573658550517760/STEM/b8b12b7299274d929fdcf1aa21a8e690.png)
![](https://img.xkw.com/dksih/QBM/2013/5/30/1573658544758784/1573658550517760/STEM/7659fb2ebb1f49b69c4c193f4427539f.png)
A.1 | B.0 | C.![]() | D.![]() |
更新时间:2013-05-30 09:51:20
|
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单选题
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适中
(0.65)
【推荐2】等腰三角形的两边
,
满足
,则它的周长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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A.17 | B.13或17 | C.13 | D.19 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】下列说法:①任何数都有算术平方根;②一个数的算术平方根一定是正数;③
的算术平方根是
;④算术平方根不可能是负数;⑤
的算术平方根是
,其中不正确的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8cc0b4997cae4d8aec791a1d3923314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce199736404bd0d5a23c54b464e2a976.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a84590674ff60fad5899e7bb966af52e.png)
A.2个 | B.3个 | C.4个 | D.5个 |
您最近一年使用:0次