Question

find a and b
(attached below)

Answer 1

where are you stuck?

Answer 2

is it just like the limit definition?

Answer 3

should i just plug in 2+h in the x

Answer 4

and at -f(2) just plug in 2 into the equation to find that last number?

Answer 5

yes, without the limit. that's it exactly, then subtract f(2) and then divide the result by h. you'll get a linear equation in h (ah+b) just like they have.

Answer 6

ok

Answer 7

hold on i'll show my work in a min.

Answer 8

k

Answer 9

i got 8h+15

Answer 10

do i = this to zero? to find h

Answer 11

nvm i foudn it!

Answer 12

:)

Answer 13

8h+26

Answer 14

@pgpilot326 thanks thanks thanks! =]

Answer 15

nope... 8h is correct but not the constant term.

If you were finding the derivative, you would take the limit as h goes to 0.
yes, 8h+26 is correct.