已知全集U={1,2,3,4,5,6,7},*A={1,3,5,6},则∁UA等于( )(A){1,3,...
问题详情： 已知全集U={1,2,3,4,5,6,7},*A={1,3,5,6},则∁UA等于()(A){1,3,5,6} (B){2,3,7}(C){2,4,7} (D){2,5,7}【回答】C解析:由题意知∁UA={2,4,7}.知识点：*与函数的概念题型：选择题...
问题详情： 已知全集U={1,2,3,4,5,6,7},*A={1,3,5,6},则∁UA等于()(A){1,3,5,6} (B){2,3,7}(C){2,4,7} (D){2,5,7}【回答】C解析:由题意知∁UA={2,4,7}.知识点：*与函数的概念题型：选择题...