Binomial Theorem · JEE Main previous year questions

2015 1 question

1. Q212015 · 4 Apr 2015 · Shift 1

   The sum of coefficients of integral power of $x$ in the binomial expansion $(1-2\sqrt{x}{)}^{50}$ is :

   1. A.$\frac{1}{2}\left(3^{50}-1\right)$
   2. B.$\frac{1}{2}\left(2^{50}+1\right)$
   3. C.$\frac{1}{2}\left(3^{50}+1\right)$
   4. D.$\frac{1}{2}\left(3^{50}\right)$
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   Answer: C