$\binom{n}{n-r} + \binom{n}{r+1}$,જ્યારે $0 \le r \le n-1$ હોય,ત્યારે તે કોના બરાબર છે?

  • A
    $\binom{n}{r-1}$
  • B
    $\binom{n}{r}$
  • C
    $\binom{n}{r+1}$
  • D
    $\binom{n+1}{r+1}$

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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.

ધારો કે $\binom{n}{k} = \frac{n!}{k!(n-k)!}$. તો સરવાળો $\frac{1}{2^{10}} \sum_{k=0}^{10} \binom{10}{k} k^2$ એ કયા અંતરાલમાં આવે છે?

જો $(1+x+x^2)^n = a_0 + a_1 x + a_2 x^2 + \ldots + a_{2n} x^{2n}$ હોય,તો $a_0 + a_2 + a_4 + \ldots + a_{2n} =$

જો $(1 + x + x^2)^n = a_0 + a_1x + a_2x^2 + \dots + a_{2n}x^{2n}$ હોય,તો $a_0 + a_3 + a_6 + \dots =$

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