Consider the function f = {(1,2), (2,1), (3,1 | vedclass

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(B) function $f: A 	o B$ is invertible if and only if it is both one-one (injective) and onto (surjective). Given $f = \{(1,2), (2,1), (3,1)\}$,we ob

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No,$f$ is not invertible.

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(B) function $f: A 	o B$ is invertible if and only if it is both one-one (injective) and onto (surjective). Given $f = \{(1,2), (2,1), (3,1)\}$,we observe the values: $f(1) = 2$ $f(2) = 1$ $f(3) = 1$ Since $f(2) = f(3) = 1$ but $2 
eq 3$,the function is not one-one. Because the function is not one-one,it cannot be invertible. Therefore,the correct answer is that $f$ is not invertible.

Consider the function $f = \{(1,2), (2,1), (3,1)\}$. Is $f$ invertible?

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