Hint: In the identity , use the binomial expansion to find the coefficient of on both sides.
I have a problem finding the sum of the series.
It goes something like this:
(nC0)^2 + (nC1))^2 + (nC2))^2 + ... + (nCn)^2
( I believe I have solved a similar problem, that went as so:
nC0 + nC1 + nC2 + ... + nCn and got 2^n )
anyones assistance would be a great help. Thankyou,