Question

find the number of subsects​

Answer 1

If a set has 1 element, then it has 2^1 = 2 subsets, namely itself and the null set. If a set has 2 elements, then it has 2^2 = 4 subsets. If a set has 3 elements, then it has 2^3 = 8 subsets. In general, if a set has m elements then it has 2^m subsets.

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