题目内容

(本题满分15分) 本题共有2个小题,第1小题满分7分,第2小题满分8分.

已知函数.

(1)若,求的值;

(2)求的最大值和最小值.

解:(1)

…………3

 …………………………………………………2

 …………………………………………………………2

(2)因为:,……………………………………4分

所以,当时,;…………………………………………………………………2分

时,…………………………………………………………………………2分

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