Question

If f(x)=x^2+3x+2, then what is

Answer 1

\[f(x+a)-f(x)\over a\] = ?
A) 2x+a+3, B) (x+a) ^2 - x^2, C) a^2+2ax +3a, D) 2x+a or E) 2x+3 ?

Answer 2

are we taking the limit of this or not? because this looks like the long way to do a derivative

Answer 3

the answer is B

Answer 4

Why is it B?

Answer 5

follow along plug in x+a to your function at the top... then subtract it by your original function up at the top. then divide by a

Answer 6

you must combine like terms then simplify

Answer 7

Oooh! right i get it now thank you.

Answer 8

you welcome