[QUOTE=sedemihcra;606004]I have not done differential calculus for awhile. I reviewed my calc book, but I am still having some trouble. Could someone please check these derivatives?
The second term should be because of the - in the numerator.
By the way, the it is simpler to get using "braces": "2^{-x}" rather than "2^-^x".
Good!
Good.