निम्नलिखित श्रेणी $\frac{C_0}{2} - \frac{C_1}{3} + \frac{C_2}{4} - \frac{C_3}{5} + \dots$ के $(n + 1)$ पदों का योग क्या है?

  • A
    $\frac{1}{n + 1}$
  • B
    $\frac{1}{n + 2}$
  • C
    $\frac{1}{n(n + 1)}$
  • D
    $\frac{1}{(n + 1)(n + 2)}$

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$\frac{^{100}C_{50}}{51} + \frac{^{100}C_{51}}{52} + \dots + \frac{^{100}C_{100}}{101}$ का मान ज्ञात कीजिए:

यदि $3 \times { }^5 C_0 + 8 \times { }^5 C_1 + 13 \times { }^5 C_2 + 18 \times { }^5 C_3 + 23 \times { }^5 C_4 + 28 \times { }^5 C_5 = k \times 2^4$ है,तो $k=$

यदि $(1+x)^n=C_0+C_1 x+C_2 x^2+\ldots+C_n x^n$ है,तो $C_0+2 C_1+3 C_2+\ldots+(n+1) C_n$ का मान ज्ञात कीजिए।

यदि $(1 + x)^n = C_0 + C_1x + C_2x^2 + .......... + C_nx^n$ है,तो $\frac{C_1}{C_0} + \frac{2C_2}{C_1} + \frac{3C_3}{C_2} + .... + \frac{nC_n}{C_{n - 1}} = $

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$2 \cdot {}^{20}C_0 + 5 \cdot {}^{20}C_1 + 8 \cdot {}^{20}C_2 + 11 \cdot {}^{20}C_3 + \dots + 62 \cdot {}^{20}C_{20}$ का मान ज्ञात कीजिए।

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