Answer:
No. of functions from an m element set to an n element set is nm as for each of the m element, we have n choices to map to, giving n×n×…n⏟m times=nm.
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If n(A) =m : n(B) = n then n^m functions are possible between A and BAnswer:
No. of functions from an m element set to an n element set is nm as for each of the m element, we have n choices to map to, giving n×n×…n⏟m times=nm.