考试数学题,
1.已知复数z=1-i,则z^2/z-1=
(A)2(B)-2(C)2i(D)-2i
2.已知全集U={-1,0,1,2},集合
A={-2,2},B={0,2},则(CuA)交于B=
(A){0}(B){2}(C){0,1,2}(D){空集}
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