1 . 已知命题
,命题
,则
是
的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a85696944c0d64d6d6b42e5841520664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18529c0643dd51876e522619faf03186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
A.充分而不必要条件 | B.必要而不充分条件 |
C.充分必要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
解题方法
2 . 已知函数
是定义在
上的偶函数,当
时,
.
(1)求函数
的解析式;
(2)判断
在
上的单调性(无需证明),并解不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db2b74d89854116e411c089d053df053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efa5b30fe86bf23da9f886f6fa4ffee1.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99f68c6ed09e483db6edf0b4caf5e252.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14c186a34823ac73b97b4fbba338c25c.png)
您最近一年使用:0次