设a∈{-3,-2,-1,-0.5,0.5,1/3,1,2,3},则使y=x^a为奇函数且在(0,+∞)上单调递减的a值的个数为
问题描述:
设a∈{-3,-2,-1,-0.5,0.5,1/3,1,2,3},则使y=x^a为奇函数且在(0,+∞)上单调递减的a值的个数为
A.1 B.2 C.3 D.4
要说为什么
答
应该选B吧,(-3,-1)