若
=0,则a,b的值分别为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/119d707c1c69bb554da55b22f8404ef1.png)
A.﹣![]() ![]() | B.![]() ![]() | C.﹣![]() ![]() | D.![]() ![]() |
更新时间:2019-02-11 19:09:26
|
【知识点】 通过对完全平方公式变形求值解读
相似题推荐
单选题
|
适中
(0.65)
【推荐1】已知整式
,
,则下列说法中正确的有( )
①不存在这样的实数
,使得
;
②无论
为何值,
和
的值都不可能同时为正;
③若
,则
;
④若
,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1368812681680e3e26f9db91d54e8a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c66a49e70678e6994e0c7c50789dfa55.png)
①不存在这样的实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a2b05129d7515ca8f2fb44497d3872c.png)
②无论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41f6a64d4f3637b2c8cff4469b78c35.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/064438815b52f596842ff104e66e6cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37524ee5f41c4744623870f6c9539361.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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