(1)计算:
;
(2)先化简,再求值;
的值,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d76607e8308cb541a784bb8907f9005d.png)
(2)先化简,再求值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9889935e74fd42bea6c7f1772c3b3ccb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45d0933d0bcfee1b8640460921dd5db.png)
更新时间:2022-02-19 15:11:32
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解答题-计算题
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适中
(0.65)
【推荐2】按要求解答
(1)计算∶![](https://staticzujuan.xkw.com/quesimg/Upload/formula/702b603d86d07d6df1129f8c82bbe335.png)
(2)先化简,再求值
,其中
,
.
(1)计算∶
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/702b603d86d07d6df1129f8c82bbe335.png)
(2)先化简,再求值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8449ea2d75033dba77ed4a36d1e8aacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da322ac8867e8a47c6588601078abf18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107babba45f110012183dc4dc54490f7.png)
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