Question: 157 f. A -B We take all the ( input, output) Pairs of of and flip them , and call it g. Use symbols to

157 f. A -B We take all the ( input, output) Pairs of of and flip them , and call it g. Use symbols to show it f is hot 1-1 Then 9 is not a function. Suppose t is 1 -1. Why do we need f to onto as well to be able to write 9:B-A

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