Evaluate the limit:
lim ((7-x)^2)-9 / 4-x
x->4
Use L'Hopitals rule:
when an inderminate form of 0/0, the
lim = lim of derivative= 2(7-x)(-1)/-1=6
lim ((7-x)^2)-9 / 4-x
x->4
when an inderminate form of 0/0, the
lim = lim of derivative= 2(7-x)(-1)/-1=6