(本小题满分16分，每小题8分) 求下列函数的值域：(1) ；(2) ，．

题型：解答题难度：简单来源：不详

(本小题满分16分，每小题8分)
求下列函数的值域：(1) ；(2) ，．

答案

（1）
（2）

解析

即值域为……………………………………………………………8分
(2) 解：
令，则y=t²-3t+2，·························································· 2分
∵x∈[-2，2]，∴，················································ 4分
，····································································· 5分
当时，，当t=4时，y_max=6，
∴········································································· 8分