I need the steps to get va/vb.... Thx

 

Assume that you have three equal poles and an amplifier and you get the textbook answer. Of course the answer given in the notes is incorrect because that answer makes the same assumption that the poles don't load each other.

 

I need the steps to get va/vb.... Thx

In this forum (Homework Help) you are expected to make an effort to solve the problem yourself.

What methods have you learned for solving networks of this sort? Show an effort to apply one of them and we will help you as needed.