$\frac{C_1}{C_0} + 2 \cdot \frac{C_2}{C_1} + 3 \cdot \frac{C_3}{C_2} + \dots + n \cdot \frac{C_n}{C_{n-1}}$ નું મૂલ્ય શું થાય?

  • A
    $\frac{n(n - 1)}{2}$
  • B
    $\frac{(n - 1)(n + 1)}{2}$
  • C
    $\frac{n(n + 1)}{2}$
  • D
    $\frac{n^2 + n}{4}$

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Similar Questions

જો $3 \leq r \leq 30$ માટે, $\binom{30}{30-r} + 3\binom{30}{31-r} + 3\binom{30}{32-r} + \binom{30}{33-r} = \binom{m}{r}$ હોય, તો $m$ ની કિંમત શોધો:

$\frac{C_1}{2} + \frac{C_3}{4} + \frac{C_5}{6} + \dots$ નું મૂલ્ય કેટલું થાય?

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

જો $26 \left( \frac{2}{3} \binom{12}{2} + \frac{2}{5} \binom{12}{4} + \frac{2}{7} \binom{12}{6} + \dots + \frac{2}{13} \binom{12}{12} \right) = 3^{13} - \alpha$ હોય, તો $\alpha$ ની કિંમત શોધો:

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

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