1.

Let A and B be two smallest sets such that A∪{1}={1,2,3,4} and B∪{5}={4,5,6,7,8}. If P=A−B and Q=B−A, then the number of relations from P to Q is

Answer»

Let A and B be two smallest sets such that A{1}={1,2,3,4} and B{5}={4,5,6,7,8}. If P=AB and Q=BA, then the number of relations from P to Q is



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