Are you sure that there is positive sign b/w x and a in upper part
Show that lim{(x^n+a^n)/(x-a)=na^n-1}as x tends to a?
The limit is given here. It depends on the sign of a^n.
If you adjust the input expression at the link above, you can also see the limit of
(x^n - a^n)/(x-a)
as x approaches a. The page offers the opportunity to see the steps in the derivation of that limit.
If you adjust the input expression at the link above, you can also see the limit of
(x^n - a^n)/(x-a)
as x approaches a. The page offers the opportunity to see the steps in the derivation of that limit.