# How do you find the derivative of #ln(x^2+y^2)#?

##### 1 Answer

There are two possible pathways here: implicit differentiation or partial differentiation.

For implicit differentiation, we have both variables (

Implicitly differetiating, then, we must resort to chain rule, by naming

Now, going to partial differentiation: we keep the chain rule logic, but in the end, we proceed differently, differentiating only one of the two variables, as follows: