Question

Let = {a, b, c} and T = {1, 2, 3}. Find F−1 of the following functions F from to T, if it exists.

(i) F = {(a, 3), (b, 2), (c, 1)} (ii) F = {(a, 2), (b, 1), (c, 1)}

Answer 1

Since F (b) = F (C) = 1, F is not one – one.
Hence, F is not invertible i.e., F−1 does not exist.