સરવાળો $\sum\limits_{i = 0}^m {\binom{10}{i}} {\binom{20}{m - i}}$,(જ્યાં $\binom{p}{q} = 0$ જો $p < q$ હોય),ત્યારે મહત્તમ થાય છે જ્યારે $m$ હોય

  • A
    $5$
  • B
    $15$
  • C
    $10$
  • D
    $20$

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ધારો કે $S = \frac{1}{25!} + \frac{1}{3!23!} + \frac{1}{5!21!} + \dots$ $13$ પદો સુધી છે. જો $13S = \frac{2^{k}}{n!}$ જ્યાં $k \in N$ હોય, તો $n + k$ ની કિંમત શોધો.

જો $\sum\limits_{K = 1}^{12} {12K \cdot {^{12}C_K} \cdot {^{11}C_{K - 1}}} $ એ $\frac{{12 \times 21 \times 19 \times 17 \times \dots \times 3}}{{11!}} \times {2^{12}} \times p$ બરાબર હોય,તો $p$ ની કિંમત શોધો.

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

જો $(1 + x)^n = C_0 + C_1x + C_2x^2 + .......... + C_nx^n$ હોય,તો $C_0^2 + C_1^2 + C_2^2 + C_3^2 + ...... + C_n^2$ =

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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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