Question 209241: if f(x) = x^2 + 3x +2 then [f(x+a)- f(x)]/a =
a) 2x+a+3 b) (x+ a)^2 - x^2 c) a^2 + 2ax + 3a d) 2x + a e) 2x+3 Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! if f(x) = x^2 + 3x +2 then [f(x+a)- f(x)]/a =
---
f(x+a) = (x+a)^2 + 3(x+a) +2
f(x+a) = x^2 +2ax + a^2 + 3x + 3a + 2
-----------------------------------------------
Subtract f(x) from f(x+a) to get:
2ax + a^2 + 3a
-----------------------
Divide by "a" to get the final answer:
2x + 3 + a
=========================
Cheers,
Stan H.
Reply to stanbon@comcast.net
-------------------------------------
a) 2x+a+3 b) (x+ a)^2 - x^2 c) a^2 + 2ax + 3a d) 2x + a e) 2x+3
(