下列函数既是奇函数,又在区间[-1,1]上单调递减的是A.f(x)=sinx    

下列函数既是奇函数,又在区间[-1,1]上单调递减的是

A.f(x)=sinx                             B.f(x)=-|x+1|

C.f(x)=ln                          D.y=

答案

答案:

C  y=sinx在[-1,1]上单调递增,f(x)=-|x+1|为非奇非偶函数,y=在x=0处无定义,故只有C符合.

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