ધારો કે $(1 + x)^m = C_0 + C_1x + C_2x^2 + C_3x^3 + . . . + C_mx^m$,જ્યાં $C_r = {}^mC_r$ અને $A = C_1C_3 + C_2C_4 + C_3C_5 + . . . + C_{m-2}C_m$ હોય,તો નીચેનામાંથી કયું વિધાન અસત્ય છે?

  • A
    $A \ge {}^{2m}C_{m-2}$
  • B
    $A < {}^{2m}C_{m-2}$
  • C
    $A = {}^{2m}C_{m-2} - {}^mC_2$
  • D
    $A < C_0^2 + C_1^2 + . . . + C_m^2$

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$\sum\limits_{k = 0}^{10} {^{20}{C_k} = }$

$\mathop \sum \limits_{0 \le i < j \le n} i \binom{n}{j}$ ની કિંમત શોધો.

$3 \cdot C_0 + 7 \cdot C_1 + 11 \cdot C_2 + \ldots + (3 + 4n) C_n =$

જો $(1+x)^n=C_0+C_1 x+C_2 x^2+\ldots+C_n x^n$ હોય,તો $C_0+2 C_1+3 C_2+\ldots+(n+1) C_n$ ની કિંમત શોધો.

ધારો કે $S = \frac{1}{25!} + \frac{1}{3!23!} + \frac{1}{5!21!} + \dots$ $13$ પદો સુધી છે. જો $13S = \frac{2^{k}}{n!}$ જ્યાં $k \in N$ હોય, તો $n + k$ ની કિંમત શોધો.

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