题目内容
(本小题满分16分,每小题8分)
求下列函数的值域:(1) ;(2) ,.
求下列函数的值域:(1) ;(2) ,.
(1)
(2)
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,ymax=6,
∴········································································· 8分
练习册系列答案
相关题目