The expression 2 log x - (3 log y + log z) is equivalent to

Suppose that x and y are both differentiable functions of t and are related by the given equation. use implicit differentiation with respect to t to determine startfraction dy over dt endfraction in terms of x, y, and startfraction dx over dt endfraction .

At which value in the domain does f(x) =0?

How to do this , and can some one explain