已知集合A={0,2},B={1,a2},若A∪B={0,1,2,4},则实数a=______.
题型:填空题难度:一般来源:不详
已知集合A={0,2},B={1,a2},若A∪B={0,1,2,4},则实数a=______. |
答案
根据题意,若A∪B={0,1,2,4},则集合A或B必然含有元素4, 又由A={0,2},B={1,a2}, 则a2=4,即a=±2; 故答案为±2. |
举一反三
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