已知2a+1的平方根是±5,a+b+7的算术平方根为4.
(1)求a、b的值;
(2)求a+b的平方根.
(1)求a、b的值;
(2)求a+b的平方根.
更新时间:2022-07-10 19:23:10
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解答题-计算题
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较易
(0.85)
【推荐2】化简,求值
(1)
;
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d3431708d3927c6b12a959bcbd654a8.png)
(3)
;
(4)
;
(5)若x、y都是实数,且
,求
的平方根.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e76b0a61d4adb30b52b49cc611044041.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d3431708d3927c6b12a959bcbd654a8.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de08867852a98848e1df2a9f7d478ad4.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/463b3f37ca53542103bbe4e99b4dae14.png)
(5)若x、y都是实数,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba802cc2f34ba0626903fe68ff94a09c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f5abf90e8307ef8dcc1030ebe7fd06a.png)
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