1.

Consider f : {1, 2, 3} rarr {a, b, c} given by f(1) = a, f(2) = b and f(3) = c. find f^(-1) and show that (f^(-1))^(-1) = f

Answer»

Solution :`F = {(1,a), (2,B), (3,C)} `
`f^(-1) = {(a,1), (b,2), (c,3)}`
`(f^(-1))^(-1) = {(1,a) (2,b), (3,c)}= f`
`THEREFORE (f^(-1))^(-1) = f`


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