calculus
posted by Yetty .
What is the limit definition of f'(x) and use it to find f'(x) for f (x) 5x^2  2

[f(x+h)f(x)]/h as h>0
if f(x) = 5 x^22
then
f(x+h) = 5(x+h)^2  2
5 x^2 + 10 xh + h^2 2
5 x^2 2
= 10 xh +h^2
divide by h
= 10 x + h
take limit as h>0
= 10 x
done