1. The problem statement, all variables and given/known data Reading the voltage taken at the output, Vo. 2. Relevant equations Resistors in parallel carry the same voltage. 3. The attempt at a solution The circuit shown in the diagram, the output is taken directly in parallel with Ro, so shouldn't that mean that: VRL = VRD = Vro ? In calculating the output, they combine all those 3 resistors in parallel into RL', I don't understand why. In other words, why doesn't Vo = VRL ?