$\frac{1}{1! 50!} + \frac{1}{3! 48!} + \frac{1}{5! 46!} + \dots + \frac{1}{49! 2!} + \frac{1}{51! 1!}$ ની કિંમત $.............$ છે.

  • A
    $\frac{2^{50}}{50!}$
  • B
    $\frac{2^{50}}{51!}$
  • C
    $\frac{2^{51}}{51!}$
  • D
    $\frac{2^{51}}{50!}$

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Similar Questions

ધારો કે $(1 + x)^{10} = \sum_{r=0}^{10} C_r x^r$ અને $(1 + x)^7 = \sum_{r=0}^7 d_r x^r$ છે. જો $P = \sum_{r=0}^5 C_{2r}$ અને $Q = \sum_{r=0}^3 d_{2r+1}$ હોય,તો $\frac{P}{2Q}$ ની કિંમત શોધો.

જો $(1 + x + x^2)^n = a_0 + a_1x + a_2x^2 + \dots + a_{2n}x^{2n}$ હોય,તો $a_0 + a_3 + a_6 + \dots =$

જો $(1-x+x^2)^n = a_0 + a_1 x + \ldots + a_{2n} x^{2n}$ હોય, તો $a_0 + a_2 + a_4 + \ldots + a_{2n}$ ની કિંમત શોધો.

$\sum_{r=1}^{15} r^2 \left( \frac{{}^{15}C_r}{{}^{15}C_{r-1}} \right) = $

શ્રેણી $\binom{20}{0} - \binom{20}{1} + \binom{20}{2} - \binom{20}{3} + \dots + \binom{20}{10}$ નો સરવાળો શું થાય?

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