First principles

[mystic ocean]

Ik how to differentiate this but how would I prove it what’s the first step?

[thin wave]

what's the formula

[mystic ocean]

There’s a formula?

[thin wave]

f'(x) = f(x+h)-f(x)/h

[mystic ocean]

Oh yeah I remember that

Do I just substitute

[thin wave]

yes

[mystic ocean]

Got it thank you

[thin wave]

oh also

lim h>0 at the front

[mystic ocean]

Ah okay

[thin wave]

bc at the end you apply that limit to your expression

and makes h=0