# Math Help - Exponential problem derivative

1. ## Exponential problem derivative

I can't seem to get the right answer for this problem (finding the derivative):

$\overline{c} = \frac{890}{q} + 3600 \cdot \frac{e^{(2q+4)/840}}{q}$

Help would be greatly appreciated.

2. What is $\overline{c}$? If we assume that it's just functional notation, then:

$\overline{c}' = -\frac{890}{q^2}+3600\cdot \frac{e^{\frac{q+2}{420}} (q-420)}{420 q^2}$ using the chain rule on $e^{\frac{2q+4}{840}$.