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Ah, I forgot. The graphs of an inverse function is the graph of the original function, reflected about the line y = x. So you could also draw a graph of the two functions and determine whether they appear to be relfections about the line y = x.
Two ways you can prove it? The only way I know is this:
But we may say:
2) x^2 hasn't inverse function because there exist two solutions of
hi..I need help with these two questions from my Review Sheet...