题目:已知集合A,B,求A∪B. (1) A={-1,0,2},B={1,2,3}; (2) A={a },B={c , e , f }; (3) A={-11,3,6,15},B= Æ; (4) A={-3,2,4},B={-3,1,2,3,4}
2020-03-02
正确答案:{-1,0,1,2,3}, {a,c,e,f}, {-11,3,6,15}, {-3,1,2,3,4}
试题解析:
正确答案:{-1,0,1,2,3}, {a,c,e,f}, {-11,3,6,15}, {-3,1,2,3,4}
试题解析: