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) = $

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

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यदि $(1 + x)^n$ के विस्तार में $5^{th}$,$6^{th}$ और $7^{th}$ पदों के गुणांक $A.P.$ में हैं,तो $n =$

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यदि $(1 + x)^n = C_0 + C_1x + C_2x^2 + .......... + C_nx^n$ है,तो $C_0^2 + C_1^2 + C_2^2 + C_3^2 + ...... + C_n^2$ =

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$^{10}C_1 + ^{10}C_3 + ^{10}C_5 + ^{10}C_7 + ^{10}C_9 = $

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