已知全集U={x|x∈N,且x≤5},A={x|x²-5x+a=0,x∈U},求集合CuA

已知全集U={x|x∈N,且x≤5},A={x|x²-5x+a=0,x∈U},求集合CuA

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问答/317℃/2024-07-03 16:39:26

优质解答:

U={ 0,1,2,3,4,5},A={x | x²-5x+a=0,x∈U },a未知

a=0 时,A={0,5} ,CuA = {1,2,3,4}

a=4 时,A={1,4} ,CuA = {0,2,3,5}

a=6 时,A={2,3} ,CuA = {0,1,4,5}

a为其他值,A = 空集,CuA = U ={ 0,1,2,3,4,5}

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