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.

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

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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 $\frac{1}{n+1} {}^{n}C_{n} + \frac{1}{n} {}^{n}C_{n-1} + \dots + \frac{1}{2} {}^{n}C_{1} + {}^{n}C_{0} = \frac{1023}{10}$ હોય,તો $n$ ની કિંમત શોધો.

જો $^nC_0 + \frac{1}{2} ^nC_1 + \frac{1}{3} ^nC_2 + \dots + \frac{1}{n+1} ^nC_n = \frac{1023}{10}$ હોય, તો $n =$ શોધો.

જો $(1-x+x^2)^{2n}$ ના વિસ્તરણમાં $x$ ની બેકી ઘાતોના સહગુણકોનો સરવાળો $3281$ હોય,તો $n=$

$\binom{30}{0}\binom{30}{10} - \binom{30}{1}\binom{30}{11} + \binom{30}{2}\binom{30}{12} - ....... + \binom{30}{20}\binom{30}{30}$ નું મૂલ્ય શું છે?

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