Understanding Logarithmic Differentiation: How to Find the Derivative of log_a(u)

derivative of loga(u)

To find the derivative of \(\log_a(u)\), you can use the logarithmic differentiation technique

To find the derivative of \(\log_a(u)\), you can use the logarithmic differentiation technique.

Using the change of base formula, we can rewrite \(\log_a(u)\) in terms of natural logarithms as:

\(\log_a(u) = \frac{\ln(u)}{\ln(a)}\)

Now, let’s differentiate both sides of the equation with respect to \(u\):

\(\frac{d}{du}(\log_a(u)) = \frac{d}{du}\left(\frac{\ln(u)}{\ln(a)}\right)\)

Using the quotient rule of differentiation on the right side, we have:

\(\frac{d}{du}(\log_a(u)) = \frac{\frac{d}{du}(\ln(u))\cdot\ln(a) – \ln(u)\cdot\frac{d}{du}(\ln(a))}{(\ln(a))^2}\)

The derivative of \(\ln(u)\) with respect to \(u\) is simply \(\frac{1}{u}\), and since \(\ln(a)\) is a constant, the derivative of \(\ln(a)\) with respect to \(u\) is zero. This simplifies our expression to:

\(\frac{d}{du}(\log_a(u)) = \frac{\frac{1}{u}\cdot\ln(a)}{(\ln(a))^2}\)

Simplifying further, we have:

\(\frac{d}{du}(\log_a(u)) = \frac{1}{u(\ln(a))}\)

Therefore, the derivative of \(\log_a(u)\) with respect to \(u\) is \(\frac{1}{u(\ln(a))}\).

More Answers:

Finding the Antiderivative of a^x Using the Power Rule for Antiderivatives and Simplifying
The Chain Rule: Finding the Derivative of e^u with Respect to x
Derivative of a^u: Understanding the Chain Rule for Exponential Functions

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