设全集U={1,2,3,4},且A={x|x2-5x+m=0,x属于U}若CuA={1,4},求m的值.
设全集U={1,2,3,4},且A={x|x2-5x+m=0,x属于U}若CuA={1,4},求m的值.
数学人气:935 ℃时间:2020-03-16 19:46:24
优质解答
CuA={1,4},即A={2,3} 2和3分别是 x^2-5x+m=0的两个根,因此m=2*3=6
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