已知集合A={X|Kπ+π/3≤Kπ+π/2,K∈Z.}B={X|x2-4≥0},则A ∩B=?

问题描述:

已知集合A={X|Kπ+π/3≤Kπ+π/2,K∈Z.}B={X|x2-4≥0},则A ∩B=?

A ∩B={X|Kπ+π/3≤Kπ+π/2,K∈Z,且k0}U[-2π /3,-2]