vasquo:
Did you simulate it? (my link above, CircuitLab)Yes, Vout=Vin. Value of resistor doesn't matter. You can even put 0R.
Yes I did ..
But the graph didn't make sense ..
Maybe I made a mistake .. I dunno ..
But are you sure .. If the op-amp is idea , Vin=Vout .. Even with the positive feedback!