Calculus Help! A general exponential demand function has the form q = Ae^−bp (A and b nonzero constants).

A general exponential demand function has the form q = Ae^−bp (A and b nonzero constants).

(a) Obtain a formula for the price elasticity E of demand at a unit price of p.
E =


(b) Obtain a formula for the price p that maximizes revenue.
p =

This is the last problem I need. Any help would be appreciated.

It's just a formula.

E = (p/q)(dq/dp)

dq/dp = -bAe^(−bp)
(p/q)(dq/dp) = [p/Ae^(−bp)] (-bAe^(−bp))
  = -pb