Question: The sum of coefficients of integral powers of $x$ in the binomial expansion of $(1-2 \sqrt{x})^{50}$ is :
$\frac{1}{2}\left(3^{50}-1\right)$
$\frac{1}{2}\left(2^{50}+1\right)$
$\frac{1}{2}\left(3^{50}+1\right)$
$\frac{1}{2}\left(3^{50}\right)$
Correct Option: , 3
Solution:
