calculus
posted by Abnerbell .
What is the derivative of f(x)=e^3x

What is 3*e^3x ? You ought to have this in your head, automatically.
f=e^ax
f'= a*e^ax
f"=a^2*e^ax 
Thats what I thought but the negative threw me off. I didn't know if I needed to subtract 1 to remove the negative. Or if that mattered in this equation.