${ }^{10} C_{1}+{ }^{10} C_{2}+{ }^{10} C_{3}+\ldots+{ }^{10} C_{9}$ ની કિંમત શું છે?

  • A
    $2^{10}$
  • B
    $2^{11}$
  • C
    $2^{10}-2$
  • D
    $2^{10}-1$

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$\sum\limits_{k = 0}^{10} {^{20}{C_k} = }$

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જો ${}^{20}C_{r}$ એ $(1+x)^{20}$ ના વિસ્તરણમાં $x^{r}$ નો સહગુણક હોય,તો $\sum_{r=0}^{20} r^{2} \cdot {}^{20}C_{r}$ નું મૂલ્ય કેટલું થાય?

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

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જો $(1+x)^n=C_0+C_1 x+C_2 x^2+\ldots+C_n x^n$ હોય,તો $C_0+2 C_1+3 C_2+\ldots+(n+1) C_n$ ની કિંમત શોધો.

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