Let A={1,2,3,4,5} and B={6,7,8,9,10,11,12}.

How many functions f:A->B are such that f -1({6,7,8})={1,2}?

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- Nov 9th 2009, 02:03 PMsbankicafunction composition and inverse function
Let A={1,2,3,4,5} and B={6,7,8,9,10,11,12}.

How many functions f:A->B are such that f -1({6,7,8})={1,2}? - Nov 9th 2009, 02:29 PMPlato
- Nov 9th 2009, 02:33 PMsbankica
4^3?

- Nov 9th 2009, 02:34 PMsbankica
so answer is: (3^2)(4^3)

- Nov 9th 2009, 02:41 PMPlato
- Nov 9th 2009, 09:13 PMoldguynewstudent
- Nov 10th 2009, 04:07 AMPlato
- Nov 10th 2009, 01:18 PMoldguynewstudent