જો $(1+x)^n = \sum_{r=0}^n C_r x^r$ હોય,તો $C_0 + (C_0 + C_1) + (C_0 + C_1 + C_2) + \ldots + (C_0 + C_1 + C_2 + \ldots + C_n)$ ની કિંમત શોધો.

  • A
    $n 2^{n-1}$
  • B
    $2^n + n$
  • C
    $(n+2) 2^n$
  • D
    $(n+2) 2^{n-1}$

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જો $(1 + x + x^2)^{25} = a_0 + a_1x + a_2x^2 + ..... + a_{50}x^{50}$ હોય,તો $a_0 + a_2 + a_4 + ..... + a_{50}$ એ :

$\frac{{^nC_0}}{1} + \frac{{^nC_2}}{3} + \frac{{^nC_4}}{5} + \frac{{^nC_6}}{7} + \dots = $

જો $C_r = { }^n C_r$ હોય,તો $C_0 + C_4 + C_8 + C_{12} + \ldots$ નો સરવાળો શોધો.

જો $(1 - x + x^2)^n = a_0 + a_1x + a_2x^2 + .... + a_{2n}x^{2n}$ હોય,તો $a_0 + a_2 + a_4 + .... + a_{2n} = $

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$2 \le r \le n$ માટે,$\binom{n}{r} + 2\binom{n}{r-1} + \binom{n}{r-2}$ ની કિંમત શોધો.

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