Let `A={1,2,3}dot` Write all one-one from `A` to itself.

Explanation

`A={1,2,3}`


Number of elements in `A=3`


Number of one-one functions = number of ways of arranging 3 elements `=3 =6`


(i) `{(1,1),(2,2),(3,3)}`


(ii) `{(1,1),(2,3),(3,2)}`


(iii) `{(1,2),(2,2),(3,3)}`


(iv) `{(1,2),(2,1),(3,3)}`


(v) `{(1,3),(2,2),(3,1)}`


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