urgente por favor
se A={1,2,3} e b={4,5,6,7}, entao:
n(P(b)) - n(P(a)) é:
a)0 b)1 C)16 d)8 e)4
se A={1,2,3} e b={4,5,6,7}, entao:
n(P(b)) - n(P(a)) é:
a)0 b)1 C)16 d)8 e)4
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