y=1-sin^2x-acosx+1
=cos^2x-acosx+1
=(cosx-a/2)^2+1-a^2/4
因?yàn)?cosx∈【-1,1】
所以
(1) a/2>1,即a>2時(shí)
cosx=1時(shí) ymin=2-a
(2) a/2
求函數(shù)y=-sin^2x-acosx+2的最小值
求函數(shù)y=-sin^2x-acosx+2的最小值
如題,求過程
如題,求過程
數(shù)學(xué)人氣:316 ℃時(shí)間:2020-06-15 04:59:57
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