If y=e^(f(x)), dy/dx=f'(x)e^(f(x))

Proof:

y={ e }^{ n }\\ \\ But:\quad n=f\left( x \right) \\ \\ \frac { dy }{ dn } ={ e }^{ n }\\ \\ n=f\left( x \right) \\ \\ \frac { dn }{ dx } =f

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