Above is question and its solution. I didn't get the first step itself. Explain in detail
Dear student,
given series is ..............(1)
as we can see it is an G.P
and we know that
here
now (1) will become
or
to find coefficient of ,we need to find the coefficient of in
we also know that coefficient of in is
so coefficient of is == (since =)
enjoy
given series is ..............(1)
as we can see it is an G.P
and we know that
here
now (1) will become
or
to find coefficient of ,we need to find the coefficient of in
we also know that coefficient of in is
so coefficient of is == (since =)
enjoy