Question

已知集合P={x|x＜3},Q={x|-1≤x≤4}则P∪Q P∩Q

Answer 1

P∪Q={x | x≤4 }（加了个等号）
P∩Q={x |-1≤x<3 }

Answer 2

P∪Q={x | x≤4 }
P∩Q={x |-1≤x<3 }