Calculus HELP? Please

[dany612]

drkohler said:

dany612 said:

Anyhow this question has this triangle shape as a coefficent which I assume is Delta but I don't recall it's revalance to this:

find limit:

((x+∆x)^2-x^2)/∆x

2x.. what did I win? That triangle is called delta and you are probably looking for lim ∆x -> 0 ?

yes I am looking for lim ∆x -> 0