Let’s suppose the following circuit:
I am trying to find a relation between Vs, V1 and V2 at this circuit. Please note that Vs is measured in relation to the ground. I have declared some extra points (A,B,C) on the circuit and using voltage divider laws and the properties of an ideal operational amplifier I came up with the following solution:
Is this correct?
Another solution with a different result is the following:
I am really confused.