given the definition of a function can the following be proved as a theorem?(adsbygoogle = window.adsbygoogle || []).push({});

.......for all f,g f=g iff Df=Dg and for all x ,xεDf -------.f(x)=g(x).............

........where Df is the domain of f,Dg is the domain of g..........................

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# Equality of functions

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