若全集U={x丨x=1/2n,n∈Z},A={x丨x=n,n∈Z},求∁UA.
问题描述:
若全集U={x丨x=
n,n∈Z},A={x丨x=n,n∈Z},求∁UA. 1 2
答
∵全集U={x丨x=
n,n∈Z},A={x丨x=n,n∈Z},1 2
∴∁UA={x|x=
,n∈Z}.2n+1 2