Binomial Theorem · NDA previous year questions

2012 2 questions

1. Q542012 · 15 Apr 2012

   In the expansion of $(1+x{)}^n$, what is the sum of even binomial coefficients?

   1. A.$2^n$
   2. B.$2^{n-1}$
   3. C.$2^{n+1}$
   4. D.None of the above
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   Answer: B

2. Q552012 · 15 Apr 2012

   The value of the term independent of x in the expansion of ${\left(x^2-\frac{1}{x}\right)}^9$ is:

   1. A.9
   2. B.18
   3. C.48
   4. D.84
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   Answer: D