1 . 已知
,
,若
,则
的值分别为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1bcf191ba1227a50a05937f0c00b808.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d95455f180bdd01a24ee5b9eb4ac2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2264c134952d41fb9bcb90e6c72c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
A.1,2 | B.2,![]() | C.2,1 | D.不存在 |
您最近一年使用:0次
2 . 已知
,
而且
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e36047abddb41d610eee6b85c828f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45c63449124223980083da5af1386c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a70d32c64918aa4d1d9d3ce0bdbf7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d10449bc77d692a7270e0f20a68cdf2.png)
您最近一年使用:0次
3 . 已知
,其中
,
.求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a70d32c64918aa4d1d9d3ce0bdbf7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a2ba685663bf232cf190132cbb3ebf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd5bea10469740c08646423c152adb1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2edfccf9159bb4010669e938f788149b.png)
您最近一年使用:0次