解题方法
1 . 设
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a525e811ffc32387348f431b04c32225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce243be426caee3afd136c7c47f3e35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa65fbb04bade6da52b633edf66b7b8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2 . (1)化简求值:
;
(2)已知
,且
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/503bcdd029abf6df0e7d95df2bc284d1.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a424f282c51f2801a1c92f9c7f673b70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/509f3b3c1900fb5a6370964162760a24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次