Test Academy | A = {1, 2, 3} which of the following function f: A → A does not have an inverse function {(1, 1), (2, 2), (3, 3)}, {(1, 2), (2, 1), (3, 1)}, {(1, 3), (3, 2), (2, 1)}, {(1, 2), (2, 3), (3, 1)}

Question

A = {1, 2, 3} which of the following function f: A → A does not have an inverse function

Options :

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

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