# Homework Help: Derivative of e^2

1. Mar 23, 2010

### Ryuk1990

1. The problem statement, all variables and given/known data

Derivative of f(x) = x3 + e2

2. Relevant equations

Dex = ex

D constant = 0

3. The attempt at a solution

f'(x) = 3x2 + 0?

Is e2 treated as a constant?

2. Mar 23, 2010

### willem2

Yes. Or you can use the chain rule. if u = f(x) = 2 and y = g(u) = $e^u$ then

$$\frac {dy} {dx} = \frac {dy} {du} \frac {du} {dx}$$

since $$\frac {du} {dx} = 0$$ $$\frac {dy} {dx} = 0$$.

3. Mar 23, 2010

### Staff: Mentor

Not only is it treated as a constant, it is a constant. The derivative of any constant is zero. Period.

Using the chain rule certainly works, but it's definitely overkill, so not recommended.