Find the coefficient of #xy^8# in the expansion of #(x-y^2)^5#?
2 Answers
Coefficient of
Explanation:
Binomial expansion of
Hence
As we are given
As we are seeking coefficient of
and corresponding term is
=
The coefficient is 5.
Explanation:
The question is asking what is the coefficient associated with the term
... and so on
So in our case if you let
From this just read off your answer.