网址:http://m.1010jiajiao.com/timu3_id_513603[举报]
如果全集U=Z,那么N的补集UN=_______________.
若全集U=Z,则CN等于( )
(A){整数} (B){非负整数} (C){负整数} (D){正整数}
如果全集U=R,A={x|2<x≤4},B={3,4},则A∩UB等于
(2,3)∪(3,4)
(2,4)
(2,3)∪(3,4]
(2,4]
A.(2,3)∪(3,4)
B.(2,4)
C.(2,3)∪(3,4]
D.(2,4]