已知全集U=={|a-1|,(a-2)(a-1),4,6},(1)若Cu(CuB)={0,1},求实数a的值(2)若CuA={3,4},求实数a的值

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已知全集U=={|a-1|,(a-2)(a-1),4,6},(1)若Cu(CuB)={0,1},求实数a的值(2)若CuA={3,4},求实数a的值

(1)所以{|a-1|,(a-2)(a-1)}={0,1},因为a-1不为0(一旦为零有重项),所以a-2=0,a=2(2)只有|a-1|或(a-2)(a-1)=3若|a-1|=3,a=4或-2,此时(a-2)(a-1)=6或12,(a-2)(a-1)=6时有重项,所以a=-2若(a-2)(a-1)=3,两个根都不...