设全集A={1,2,3,4,5,6,7,8,9},Cu(A∪B),A∩(CuB)={2,4},求集合B
1个回答
Cu(A∪B)这个条件是不是没全啊
设2X-1=A∈[1,5] X=(A+1)/2
F(A)=[(A+1)/2]^2-(A+1)/2-3
化简以后,把A换成X就可以了,别忘了定义域
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