解1 A∩B = { x | -1 < x ≤ 2 }∩{ x | 0 < x < 3} = { x | 0 < x ≤2 }
A∪B ={x | -1 < x ≤ 2 }∪{ x | 0 < x < 3} = { x | -1< x < 3 }
Cu (A∩B) = {x | -6≤x≤0 或 2
解1 A∩B = { x | -1 < x ≤ 2 }∩{ x | 0 < x < 3} = { x | 0 < x ≤2 }
A∪B ={x | -1 < x ≤ 2 }∪{ x | 0 < x < 3} = { x | -1< x < 3 }
Cu (A∩B) = {x | -6≤x≤0 或 2