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UPSC NDA II 2014 Mathematics Paper

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For the next five (05) items that follow:
Consider the expansion (x2+

1

x

)15

[NDA II 2014]

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Question : 30

Total: 120

What is the sum of the coefficients of the middle terms in the given expansion?

C(15,9)
C(16,9)
C(16,8)
None of the above

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