已知
,且
,求下列各式的值.
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d7a1f8fef63453b174b4dea76a6c7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d394016b9fecac73f38cbc4ff18dee2.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6717866ce0de2a1b7030373d74e2774.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76cfc287ffa06492720f8080e033b80a.png)
更新时间:2017-07-26 20:31:06
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