1. The problem statement, all variables and given/known data Using the conservation of angular momentum and Kelper's third law, show that the relative change in orbital period produced by mass transfer is given by 1/P * dP/dt = 3 dM1/dt * (M1 - M2)/(M1M2) 2. Relevant equations L = mu * sqrt(GMa) P^2 = (4*PI^2)/(G(M1+M2)) * a^3 3. The attempt at a solution see attachment I was so close to the answer... I really can't figure out what's missing... is there somehow a miscalculation in my proof?