Question

f(x)= 2x^2+x
find f(x+h)

Answer 1

Finding the derivative using the definition?

Answer 2

I ended up with 3x^2+3h^2+4xh

Answer 3

is that correct

Answer 4

Are you just plugging it in or are you using \(\large \lim_{h \rightarrow 0}\frac{f(x-h)-f(x)}{h}\)

Answer 5

pretty much but the x-h should be x+h

Answer 6

Oh, right sorry.
So using the limit?

Answer 7

yes

Answer 8

If it's the definition, then there aren't suppose to be any left over h's.