Okay here's the question:
Find and simplify f(a+h) - f(a) (h cannot = 0) for the function.
__________
h
f(x)=x^2-2 (that means f of x equals x squared - 2)
I dont understand what I'm supposed to plug in for a and h. I'm not given what theyre equal to. Please help!
2007-01-18 12:31:12 · 3 answers · asked by packerswes4 5 in Science & Mathematics ➔ Mathematics
crap that didnt post right
it's supposed to read f(a+h) - f(a) all divided by h
2007-01-18 12:32:08 · update #1
Try just pluging them in as they are- as a & h.
f(a+h)= (a+h)^2 -2 ,.. f(a)= (a)^2 -2
I could be wrong, but if you are not given what they equal, this sounds to me like the only logical thing to do.
2007-01-18 12:41:27 · answer #1 · answered by smartee 4 · 0⤊ 0⤋
Hey what! I dont know that
2007-01-18 20:33:59 · answer #2 · answered by YouRock 2 · 0⤊ 0⤋
f(a+h)-f(a)
----------------=
h
(a+h)**2-2-(a^2-2)
------------------------=
h
a^2+2ah+h^2-2-a^2+2
-----------------------------=
h
2ah
= --------=2a
h
I hope it's readable :) I think this is what you should do, I guess you are about to learn about derivatives.
2007-01-18 20:40:05 · answer #3 · answered by Amelia 2 · 0⤊ 0⤋