Question

How to get limit from this?
lim ( (x+h)^2 - x^2 ) / h as h->0

wolfram alpha says 2x but i get 0.
= (x^2 + 0 - x^2) / 0
= 0/0

Answer 1

you need to expand (x+h)^2, then simplify the whole equation..
then substitute h=0 when you already simplified it..

Answer 2

ah.. simple mistake. thanks

Answer 3

did you get it?

Answer 4

yup.