Question

Find all the possible values of ‘a’ if

x
^9-a^9/ x-a = 9​

Answer 1

Answer:

Using formula

x→a

lim

x−a

x

n

−a

n

=na

n−1

x→a

lim

x−a

x

9

−a

9

=9.9

8

=9

a

8

=1⇒a=±1