Question: using the limit definition, prove that if two functions f(x) and g(x) are differentiable, then (f.g)'(x)=f'(x)g(x) + f(x)g'(x)

using the limit definition, prove that if two functions f(x) and g(x) are differentiable, then (f.g)'(x)=f'(x)g(x) + f(x)g'(x)

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