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Let f: X->Ybe an invertible function. Sh...

Let `f: X->Y`be an invertible function. Show that f has unique inverse. (Hint: suppose `g_1( and g)_2`are two inverses of f. Then for all `y in Y ,fog_1(y)=I_Y(y)=fog_2(y)`Use one oneness of f ).

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