The current in a 15 millihenry inductor is known to be: i = 4 amperes, for t < 0 and i = A1 * e -2000*t + A2 * e -8000*t amperes, for t > 0 The voltage across the inductor (assuming the passive sign convention) is 58 volts at t = 0(+) seconds. I need to find the constants a1 and a2. I have already derived the expression for voltage @ t=0: 58=-30(a1+4*a2). Unfortunately, I am now lost. I cannot figure out an equation with 2 unknowns. Any help would be greatly appreciated. I don't believe the fact that i = 4 amperes, for t < 0 is significant for this part of the problem.