# Really basic derivatives question

1. Sep 27, 2011

### stonecoldgen

it's just something thechnical

let's say i have the function x2+3x+2

when they say f(x+$\Delta$x)

is it (x+$\Delta$x)2+2(x+$\Delta$x)+2

or

another way?

2. Sep 27, 2011

### Dick

It's that. Except you have 3 in the first expression and a 2 in the second in the linear term. Typo, I guess?

3. Sep 27, 2011

### stonecoldgen

thanks lot and yeah, typo