यदि $(1 + x)^n = C_0 + C_1x + C_2x^2 + .... + C_nx^n$ है,तो $C_0C_2 + C_1C_3 + C_2C_4 + .... + C_{n-2}C_n$ का मान क्या होगा?

  • A
    $\frac{(2n)!}{(n+1)!(n+2)!}$
  • B
    $\frac{(2n)!}{(n-2)!(n+2)!}$
  • C
    $\frac{(2n)!}{n!(n+2)!}$
  • D
    $\frac{(2n)!}{(n-1)!(n+2)!}$

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$\sum\limits_{r = 0}^{n - 1} {\frac{{^n{C_r}}}{{^n{C_r} + {\,^n}{C_{r + 1}}}}} $ का मान क्या है?

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यदि $(1 + x)^n = \sum\limits_{r = 0}^n {{C_r}{x^r}} $ है,तो $\left( {1 + \frac{{{C_1}}}{{{C_0}}}} \right)\left( {1 + \frac{{{C_2}}}{{{C_1}}}} \right)....\left( {1 + \frac{{{C_n}}}{{{C_{n - 1}}}}} \right) = $

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यदि $(1 + x)^{15} = C_0 + C_1x + C_2x^2 + ...... + C_{15}x^{15}$ है,तो $C_2 + 2C_3 + 3C_4 + .... + 14C_{15} = $

यदि $^nC_0 + \frac{1}{2} ^nC_1 + \frac{1}{3} ^nC_2 + \dots + \frac{1}{n+1} ^nC_n = \frac{1023}{10}$ है, तो $n =$ का मान क्या है?

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