(本小题满分16分，每小题8分) 求下列函数的值域：(1) ；(2) ，
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| （1）  （2）  |
 即值域为 ……………………………………………………………8分(2) 解：  令  ，则 y = t 2 -3 t +2，·························································· 2分∵ x ∈[-2，2]，∴  ，················································ 4分 ，····································································· 5分当   时， ，当 t =4时， y max =6，∴ ········································································· 8分 |
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