解不等式或方程组:
(1)
; (2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a86c183ba4fd95f67a36d397fa8e1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/922771f83c1559c7b81700a71562d698.png)
更新时间:2019-07-12 14:57:39
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解答题-计算题
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较易
(0.85)
【推荐1】根据要求解答下列各题.
(1)计算:
;
(2)解方程组:
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7105cc4c82878ae9eeb554371f096e7.png)
(2)解方程组:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b4cfbf1d89ee349b2cefe8f483669e2.png)
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