设A={1,3,5,7},B={2,3,4,9},则AnB=____,AUB____.谢
问题描述:
设A={1,3,5,7},B={2,3,4,9},则AnB=____,AUB____.谢
设A={1,3,5,7},B={2,3,4,9},则AnB=____,AUB____.
答
3
1 2 3 4 5 7 9