# Answer on Calculus Question for radhs

Question #1692

Use logarithmic differentiation to find the derivative of the function.

y = (tan(x))^(3/x)

y = (tan(x))^(3/x)

Expert's answer

d/dx( f(x)^g(x) ) = d/dx( e^( ln( f(x)^g(x) ))) = d/dx (e^(g(x)*ln(f(x)) = (g(x)ln(f(x))'*

(e^(g(x)*ln(f(x)) = (g'(x) ln(f(x)) + g(x)f'(x)/f(x))*(e^(g(x)*ln(f(x)) =

= (g'(x) ln(f(x)) + g(x)f'(x)/f(x)) f(x)^g(x)

(e^(g(x)*ln(f(x)) = (g'(x) ln(f(x)) + g(x)f'(x)/f(x))*(e^(g(x)*ln(f(x)) =

= (g'(x) ln(f(x)) + g(x)f'(x)/f(x)) f(x)^g(x)

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