$^{15}C_0^2 - ^{15}C_1^2 + ^{15}C_2^2 - ... - ^{15}C_{15}^2$ ની કિંમત શું છે?

  • A
    $15$
  • B
    $-15$
  • C
    $0$
  • D
    $51$

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$\binom{50}{4} + \sum_{i=1}^{6} \binom{56-i}{3} = \dots$

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.

$^nC_0 - \frac{1}{2} ^nC_1 + \frac{1}{3} ^nC_2 - \dots + (-1)^n \frac{^nC_n}{n+1} = $

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જો $\frac{{}^{11}C_1}{2} + \frac{{}^{11}C_2}{3} + \dots + \frac{{}^{11}C_9}{10} = \frac{n}{m}$ અને $\gcd(n, m) = 1$ હોય,તો $n + m$ ની કિંમત શોધો.

${ }^{34}C_{10} + 3 \cdot { }^{34}C_{9} + 3 \cdot { }^{34}C_{8} + { }^{34}C_{7} = $

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