Given the following circuit http://img499.imageshack.us/img499/4519/ress0ro.png [Broken] How do you determine the total resistance? The book tells me the answer is R2 || (R1 + R3). How would I analyze the circuit to get that answer? I really cant see how R2 is in parallel with the rest. To me it looks like R2 is in parallel with a short.