Question

求解一道高一数学题.

设全集U=｛X｜X=(1/2)n,n∈Z｝,A==｛X｜X=n,n∈Z｝,则CuA(A的补集)=____

Answer 1

{X｜X=(1/2)(2n+1),n∈Z}

Answer 2

CuA={X|X=(2n+1)/2,n∈Z}

Answer 3

A的补集={X｜X=(1/2)(2n+1),n∈Z}