Let be defined implicitly by , where is a given function of three variables.
Prove that if and are differentiable, then
I am kind of confused with . Should I differentiate / and /, but there's nothing inside and so what should I differentiate and with then? I've been told that this is something related to implicit differentiation. In some other examples, they do use differentiate i.e. but in most examples, I only see that they are differentiating the variables inside it.