Hello im stuck with a problem and the ONLY way i wanna solve it with a formel we suposed to use not derivate.

on point (3,2)

the formel ima use is lim x->0 and a=3

Progress:

it is suposed to mean that all that divide by h im trying my best with latex does not work well (notice i rewrite (3-1)/(3-2) as 2...

= (notice that h is suposed to divide all that i mean like (a/b)/(c/d) and h is the c and that in latex code is a at top and b the one down.

this is where i notice this dont work over and over... i am doing something wrong that i cant see