已知I=R,设A={x/-1<x<2},B={x/0≤x<5},则CIA∩CIB=?A∪CIB=?

问题描述:

已知I=R,设A={x/-1<x<2},B={x/0≤x<5},则CIA∩CIB=?A∪CIB=?

A = {x丨- 1 B = {x丨0 ≤ x ∴ CIA = {x丨x ≤ - 1 或 x ≥ 2 }
CIB = {x丨x
∴ CIA ∩ CIB = {x丨x ≤ - 1 或 x ≥ 5}

A ∪ CIB = {x丨x