Solve the Circuit: Find v(t) Over Inductors

[jesuslovesu]

Homework Statement

http://img134.imageshack.us/img134/8382/circujitqt7.th.jpg

i0(0) = 10 A
i1(0) = 20 A
The currents through the inductors flow from top to bottom. And v(t) is + on top and - on bottom

Homework Equations

The Attempt at a Solution

Find the voltage v(t) over both inductors.
Since the current going through both inductors is 30 amps total, I get 30*48 ohms
v(t) = $$1440 e^(-600t) [\tex]<br /> unfortunately, according to my book it's -1440 for the coefficient, what am I doing wrong?<br /> I really don't see why it would be negative, both of the currents are flowing in the same direction$$

 

[kamerling]

The current going through the resistor is going from bottom from top. So the bottom must be more positive than the top