若(x-2)2+|y+3|=0,则yx=_________ .
更新时间:2018-02-01 09:56:42
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【推荐1】已知
的三边 a,b,c 满足等式
,则
是______ 三角形.
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【推荐1】观察下列算式:①
,②
,③
,④
,⑤
,⑥
,⑦
,⑧
,…那么
的个位数字是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a8d2e5a71a80815b3454e2fe4140e3.png)
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【推荐2】已知a、b、c都不等于0,且
的最大值为m,最小值为n,则
=_______ .
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