જો $\sum_{r=0}^5 \frac{{}^{11}C_{2r+1}}{2r+2} = \frac{m}{n}$,$\text{gcd}(m, n) = 1$ હોય,તો $m - n$ ની કિંમત . . . . . . થાય.

  • A
    $2785$
  • B
    $2035$
  • C
    $5039$
  • D
    $2235$

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$C_0 C_r + C_1 C_{r+1} + C_2 C_{r+2} + \dots + C_{n-r} C_n =$

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જો $\sum_{k=1}^{30} k \left({ }^{30} C _k\right)^2 = \frac{\alpha 60 !}{(30 !)^2}$ હોય,તો $\alpha$ ની કિંમત શોધો.

જો $(1+x-2x^2)^6 = 1+a_1x+a_2x^2+\ldots+a_{12}x^{12}$ હોય,તો $a_2+a_4+a_6+\ldots+a_{12}$ ની કિંમત શોધો.

જો $p$ અને $q$ ધન પૂર્ણાંકો હોય,તો $(1 + x)^{p + q}$ ના વિસ્તરણમાં $x^p$ અને $x^q$ ના સહગુણકો શું હશે?

$\frac{1}{1!(n - 1)!} + \frac{1}{3!(n - 3)!} + \frac{1}{5!(n - 5)!} + \dots = $

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