设*A={5,log2(a+3)},*B={a,b}.若A∩B={2},则A∪B= . 问题详情:设*A={5,log2(a+3)},*B={a,b}.若A∩B={2},则A∪B= .【回答】{1,2,5}知识点:常用逻辑用语题型:填空题...