$\sum \limits_{k=0}^{6} {}^{51-k}C_{3}$ ની કિંમત શોધો.

  • A
    ${}^{51}C_{4}-{}^{45}C_{4}$
  • B
    ${}^{51}C_{3}-{}^{45}C_{3}$
  • C
    ${}^{52}C_{4}-{}^{45}C_{4}$
  • D
    ${}^{52}C_{3}-{}^{45}C_{3}$

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જો $(1+x)^n = \sum_{r=0}^n C_r x^r$ હોય,તો $C_0 + (C_0 + C_1) + (C_0 + C_1 + C_2) + \ldots + (C_0 + C_1 + C_2 + \ldots + C_n)$ ની કિંમત 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:

ધારો કે $n \in N$ અને $[x]$ એ $x$ થી નાનો અથવા તેના જેટલો મહત્તમ પૂર્ણાંક દર્શાવે છે. જો $(n+1)$ પદો ${}^{n}C_{0}, 3 \cdot {}^{n}C_{1}, 5 \cdot {}^{n}C_{2}, 7 \cdot {}^{n}C_{3}, \ldots$ નો સરવાળો $2^{100} \cdot 101$ હોય,તો $2\left[\frac{n-1}{2}\right]$ ની કિંમત $....$ થાય.

જો $(1 + x)^n = C_0 + C_1x + C_2x^2 + .......... + C_nx^n$ હોય,તો $\frac{C_1}{C_0} + \frac{2C_2}{C_1} + \frac{3C_3}{C_2} + .... + \frac{nC_n}{C_{n - 1}} = $

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$^{15}C_3 + ^{15}C_5 + \ldots + ^{15}C_{15} = ?$

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