1. The problem statement, all variables and given/known data The problem wants me to find the equivalent resistance at the terminals. Here is the circuit plus some of my work. The Answer according to the teacher is C. http://i.imgur.com/JaW7f.jpg 2. Relevant equations 3. The attempt at a solution As seen from my work, I added a test source. By doing this I'm trying to solve for I norton so i can divide the test source by I norton for the resistance. I start doing node voltage analysis at the node closest to the test voltage. From the calculations I find the voltage of the node farthest of the voltage source to be 2 volts. I then use node voltage at that node to solve for i0. I found i0 to be 3/4A however after that i'm completely lost.