Posted by **Jake** on Monday, February 13, 2012 at 10:51pm.

Find each function, find f(a+h) and f(a+h)-f(a)

a) f(x)=5x-2

- Calculus -
**Damon**, Monday, February 13, 2012 at 11:00pm
5(a+h) -2 = 5a + 5h - 2

5(a) -2 = 5 a - 2

--------------------------subtract

5 h is the answer

now if we were doing calculus we would divide that by h and then let h go to 0

5 h/h = 5

and we call that the "derivative" of f(x)=5x-2

- Calculus -
**Jake**, Monday, February 13, 2012 at 11:11pm
May I know where you got 5a + 5h - 2

- Calculus -
**Damon**, Monday, February 13, 2012 at 11:20pm
f(a+h) = 5(a+h) - 2

from your function definition

5(a+h) -2 = 5 a + 5 h - 2

- Calculus -
**Jake**, Monday, February 13, 2012 at 11:27pm
Thank you~

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