JEE Math Practice Question
The sum of coefficients of integral power of $$x$$ in the binomial expansion $${\left( {1 - 2\sqrt x } \right)^{50}}$$ is :
- A.$${1 \over 2}\left( {{3^{50}} - 1} \right)$$
- B.$${1 \over 2}\left( {{2^{50}} + 1} \right)$$
- C.$${1 \over 2}\left( {{3^{50}} + 1} \right)$$
- D.$${1 \over 2}\left( {{3^{50}}} \right)$$
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