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

  • A
    $^{n + m + 1}{C_{n + 1}}$
  • B
    $^{n + m + 2}{C_n}$
  • C
    $^{n + m + 3}{C_{n - 1}}$
  • D
    આમાંથી કોઈ નહીં

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

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