1.

If the sum of odd terms and the sum of even terms in (x + a)^n are p and q respectively then 4pq =

Answer»

`(X+a)^(2N) - (x -a )^(2n)`
`(x^2 -a^2)^(2n) + (x + a)^(2n)`
`(x^2 - a^2)^N - (x - a)^(2n)`
`(x^2 +a^2)^n + (x - a)^(2n)`

ANSWER :A


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