不等式的解集是____________.
计算: = .
已知A={x|x≤1或x>3},B={x|x>2},则(A)∪B= .
如果S={x∈N|x<6},A={1,2,3},B={2,4,5},那么(A)∪(B)= .
已知集合A={x|x<1或x>5},B={x|a≤x≤b},且A∪B=R,A∩B={x|5<x≤6}, 则2a-b= .
.设集合A={0,1,2,4,5,7},B={1,3,6,8,9},C={3,7,8}.则集合(A∩B)∪C= , (A∪C)∩(B∪C)= .