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(本小题满分13分) 已知,函数. (1)求函数的最小正周期; (2)求函数的单...

(本小题满分13分)

已知6ec8aac122bd4f6e,函数6ec8aac122bd4f6e

(1)求函数6ec8aac122bd4f6e的最小正周期;

(2)求函数6ec8aac122bd4f6e的单调减区间;

(3)当6ec8aac122bd4f6e时,求函数6ec8aac122bd4f6e的值域.

 

【解析】 ··················································· 2分 ································································· 5分 ·············································································· 6分 ······················································································· 7分 (1) 的最小正周期···································································· 8分 (2) 由得 ∴ 的单调减区间为··············································· 10分 (3) ∵ ∴      ∴ ∴ 即的值域为··············································································· 12分 【解析】略
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