a. On the problem hint, "differentiate" means to differentiate "a" and "b".
After that, you can get the answer "a" and "b".--Kim415 09:55, 13 April 2009 (UTC)
I believe this is correct. My understand was that you differentiate in terms of a. Then, you differentiate the original equation *not the newly obtained one via the differentiation in terms of a) in terms of b. These two equations will present the classic, and easy-to-solve, case of two-equations-and-two-unknowns. From here on out, it is basic algebra. Oh, joy! I may be wrong, however, so do not take my word for it. Also, if anyone has a better idea, please, tell me.
--vhsieh 11:08, 13 April 2009 (UTC)
