Question: Let f and g be one-to-one functions. Prove that (a) f g is one-to-one. (b) (f g) -1 (x) = (g -1

Let f and g be one-to-one functions. Prove that
(a) f º g is one-to-one.
(b) (f º g)-1(x) = (g-1 º f-1)(x).

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