Derivative of $$$\frac{\ln\left(a\right)}{\ln\left(b\right)}$$$ with respect to $$$a$$$

The calculator will find the derivative of $$$\frac{\ln\left(a\right)}{\ln\left(b\right)}$$$ with respect to $$$a$$$, with steps shown.

Related calculators: Logarithmic Differentiation Calculator, Implicit Differentiation Calculator with Steps

Leave empty for autodetection.
Leave empty, if you don't need the derivative at a specific point.

If the calculator did not compute something or you have identified an error, or you have a suggestion/feedback, please contact us.

Your Input

Find $$$\frac{d}{da} \left(\frac{\ln\left(a\right)}{\ln\left(b\right)}\right)$$$.

Solution

Apply the constant multiple rule $$$\frac{d}{da} \left(c f{\left(a \right)}\right) = c \frac{d}{da} \left(f{\left(a \right)}\right)$$$ with $$$c = \frac{1}{\ln\left(b\right)}$$$ and $$$f{\left(a \right)} = \ln\left(a\right)$$$:

$${\color{red}\left(\frac{d}{da} \left(\frac{\ln\left(a\right)}{\ln\left(b\right)}\right)\right)} = {\color{red}\left(\frac{\frac{d}{da} \left(\ln\left(a\right)\right)}{\ln\left(b\right)}\right)}$$

The derivative of the natural logarithm is $$$\frac{d}{da} \left(\ln\left(a\right)\right) = \frac{1}{a}$$$:

$$\frac{{\color{red}\left(\frac{d}{da} \left(\ln\left(a\right)\right)\right)}}{\ln\left(b\right)} = \frac{{\color{red}\left(\frac{1}{a}\right)}}{\ln\left(b\right)}$$

Thus, $$$\frac{d}{da} \left(\frac{\ln\left(a\right)}{\ln\left(b\right)}\right) = \frac{1}{a \ln\left(b\right)}$$$.

Answer

$$$\frac{d}{da} \left(\frac{\ln\left(a\right)}{\ln\left(b\right)}\right) = \frac{1}{a \ln\left(b\right)}$$$A