# Math Help - Derivative

1. ## Derivative

Hi

Just wanted to see if anyone could tel me if i have found the derivative correctly

F(x) = 15e^(-x)ln(x+1)

F'(x) = -e^(-x)((15x+15)ln(x+1)-15) / (x+1)

Is there any programs on the internet that you can download that calculate this out?

2. Originally Posted by kayne
Hi

Just wanted to see if anyone could tel me if i have found the derivative correctly

F(x) = 15e^(-x)ln(x+1)

F'(x) = -e^(-x)((15x+15)ln(x+1)-15) / (x+1)

Is there any programs on the internet that you can download that calculate this out?
Somethings is wrong
$
\frac{d(15e^{-x}ln(1+x))}{dx}

$

$
= -15e^{-x} ln(1+x) + \frac{15 e^{-x}}{1+x}
$

Once you will practise it you won't really need that

3. Gee i am really out there in left field will go back and see where i went wrong. Thanks