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Find the derivative of the following function.

y=log_(5)(-4x^(5))
Answer: 
y^(')=

Find the derivative of the following function.\newliney=log5(4x5) y=\log _{5}\left(-4 x^{5}\right) \newlineAnswer: y= y^{\prime}=

Full solution

Q. Find the derivative of the following function.\newliney=log5(4x5) y=\log _{5}\left(-4 x^{5}\right) \newlineAnswer: y= y^{\prime}=
  1. Identify Function & Derivative Type: Identify the function and the type of derivative to be found.\newlineWe need to find the derivative of the function y=log5(4x5)y = \log_5(-4x^5) with respect to xx. This involves using the chain rule and the logarithmic differentiation rule.
  2. Apply Chain Rule: Apply the chain rule for derivatives.\newlineThe chain rule states that the derivative of a composite function is the derivative of the outer function evaluated at the inner function times the derivative of the inner function. For the logarithmic function y=log5(u)y = \log_5(u), where u=4x5u = -4x^5, the derivative with respect to xx is (1/u)(du/dx)(1/u) \cdot (du/dx).
  3. Differentiate Inner Function: Differentiate the inner function u=4x5u = -4x^5 with respect to xx. The derivative of uu with respect to xx is dudx=4×5x51=20x4\frac{du}{dx} = -4 \times 5x^{5-1} = -20x^4.
  4. Apply Change of Base Formula: Apply the change of base formula for logarithms. The change of base formula is logb(a)=logc(a)logc(b)\log_b(a) = \frac{\log_c(a)}{\log_c(b)}. We can rewrite yy as log5(4x5)=log(4x5)log(5)\log_5(-4x^5) = \frac{\log(-4x^5)}{\log(5)}, where the base cc of the logarithm is the natural logarithm (base ee).
  5. Combine Results for Derivative: Combine the results from Steps 22, 33, and 44 to find the derivative.\newlineUsing the chain rule, the derivative of yy with respect to xx is y=1(4x5)×20x4log(5)y' = \frac{1}{(-4x^5)} \times \frac{-20x^4}{\log(5)}.
  6. Simplify Derivative Expression: Simplify the expression for the derivative.\newliney=20x44x5/log(5)=204x/log(5)=5xlog(5)y' = \frac{-20x^4}{-4x^5} / \log(5) = \frac{20}{4x} / \log(5) = \frac{5}{x \cdot \log(5)}.

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