網(wǎng)址:http://wineducation.cn/paper/timu/5153673.html[舉報(bào)]
1.函數(shù)f (x)=log0.5(sinxcosx)的單調(diào)遞減區(qū)間是(以下k∈Z)( )
A.(k-,k) B.
C. D.
聯(lián)想:(1)函數(shù)y=cos()的單調(diào)遞增區(qū)間為( )
A.[4] B.[]
C.[] D.[] (以上k∈Z)
(2)函數(shù)f (x)=lg(sinx-cosx)的單調(diào)遞減區(qū)間為 。