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If the sum of odd terms and the sum of even terms in `(x + a)^n` are p and q respectively then `p^2 - q^2 = `

A

`(x^2 +a^2)^n`

B

`(x^2 - a^2)^n`

C

`(a^2 - x^2)^n`

D

`x^2 - a^2`

Text Solution

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The correct Answer is:
B
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