જો $(1 + x)^n = C_0 + C_1x + C_2x^2 + ... + C_nx^n$ હોય,તો $C_0 + C_2 + C_4 + C_6 + ...$ ની કિંમત શું થાય?

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

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$\sum\limits_{r = 0}^m {^{n + r}{C_n} = } $

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$^nC_0 - \frac{1}{2} ^nC_1 + \frac{1}{3} ^nC_2 - \dots + (-1)^n \frac{^nC_n}{n+1} = $

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વિધાન $-1$: $\sum_{r=0}^{n} (r+1) \binom{n}{r} = (n+2) 2^{n-1}$
વિધાન $-2$: $\sum_{r=0}^{n} (r+1) \binom{n}{r} x^r = (1+x)^n + nx(1+x)^{n-1}$

$^{15}C_0^2 - ^{15}C_1^2 + ^{15}C_2^2 - ... - ^{15}C_{15}^2$ ની કિંમત શું છે?

જો $(1+x)^n = p_0 + p_1 x + p_2 x^2 + \ldots + p_n x^n$ હોય,તો $p_0 + p_3 + p_6 + \ldots$ ની કિંમત શોધો.

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