1.

Set A has m elements and Set B has n elements. If the total number of subsets of A is 112 more than the total number of subsets of B, then the value of m.n is ___.

Answer»

2m – 2n = 112 

m = 7, n = 4 

(27 – 24 = 112) 

m × n = 7 × 4 = 28



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