试题与答案

下列函数中,既是偶函数又在(0,+∞)单调递增的函数是( ) A.y=-1x B.y

题型:选择题

题目:

下列函数中,既是偶函数又在(0,+∞)单调递增的函数是(  )
A.y=-
1
x
B.y=e|x|C.y=-x2+3D.y=cosx

答案:

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