题目内容
已知函数
.
(1)若
,求
的值;
(2)若
对于
恒成立,求实数
的取值范围。

(1)若


(2)若



(1)
(2)

(2)

解:(1)当
时,
;当
时,
.
由条件可知
,即
,
解得
.
,
.
(2)当
时,
,
即
.
,
.
,
故
的取值范围是
.




由条件可知



解得





(2)当


即





故



练习册系列答案
相关题目