ધારો કે $S = \frac{2}{1} {}^{n}C_{0} + \frac{2^{2}}{2} {}^{n}C_{1} + \frac{2^{3}}{3} {}^{n}C_{2} + \ldots + \frac{2^{n+1}}{n+1} {}^{n}C_{n}$ છે. તો, $S$ ની કિંમત શું થાય?

  • A
    $\frac{2^{n+1}-1}{n+1}$
  • B
    $\frac{3^{n+1}-1}{n+1}$
  • C
    $\frac{3^{n}-1}{n}$
  • D
    $\frac{2^{n}-1}{n}$

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