(本小题满分16分，每小题8分) 求下列函数的值域：(1) ；(2) ，．

(本小题满分16分，每小题8分)

求下列函数的值域：(1) ；(2) ，．

（1）（2）【解析】即值域为……………………………………………………………8分 (2) 【解析】令，则y=t2-3t+2，·························································· 2分 ∵x∈[-2，2]，∴，················································ 4分，····································································· 5分当时，，当t=4时， ymax=6， ∴········································································· 8分

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