Question

Finding Req for an equation
I can do the bottom half but I'm not sure how to treat the wire that has no resistance, does all the current go there and therefore bypass the others?
(See photo in comment)

Answer 1

is the answer 3 ??

Answer 2

There is some assumptions that I am making. Assumption No. 1: There should be a dot on the intersection on the lower portion of the wire and the first 3 Ohm resistor. Assumption No. 2: The resistors are connected using wire that is typically very low resistance that can be neglected and as you say "no resistance"

Examine closely the wire that connects to the top between the 1 and 2 resistor and travels down to lower circuit above the first 3 ohm and travels to the right to the junction the three resistors, 3 3 and 2 and then continues upwards to the bottom of the upper circuit at the junction of resistors 2 and 4. This forms a shunt around the upper circuit effectively putting it to a value of 0 Ohms. Two input leads are effectively connected across the bottom circuit like this: giving you a total effective resistance of 1 Ohm (3 3 Ohms in parallel.)