यदि $x = \frac{1 \cdot 3}{3 \cdot 6} + \frac{1 \cdot 3 \cdot 5}{3 \cdot 6 \cdot 9} + \frac{1 \cdot 3 \cdot 5 \cdot 7}{3 \cdot 6 \cdot 9 \cdot 12} + \ldots$ अनंत पदों तक है,तो $9x^2 + 24x = $

  • A
    $31$
  • B
    $11$
  • C
    $41$
  • D
    $21$

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Similar Questions

List-$I$ का List-$II$ के साथ सही मिलान है:
List-$I$ List-$II$
$(A)$ $(1-x)^{-n}$ $(i)$ $\frac{x}{x+1}$
$(B)$ $(1+x)^{-n}$ $(ii)$ $1-nx+\frac{n(n+1)}{2!}x^2-\dots$ यदि $|x| < 1$
$(C)$ यदि $x>1$ है,तो $1+\frac{1}{x}+\frac{1}{x^2}+\dots$ है $(iii)$ $1+nx+\frac{n(n+1)}{2!}x^2+\dots$ यदि $|x| < 1$
$(D)$ यदि $|x|>1$ है,तो $1-\frac{2}{x^2}+\frac{3}{x^4}-\frac{4}{x^6}+\dots$ है $(iv)$ $\frac{x}{x-1}$
  $(v)$ $\frac{x^4}{(x^2+1)^2}$
  $(vi)$ $\frac{x^4}{(x^2-1)^2}$

$\frac{1}{8} - \frac{7}{8 \times 12} + \frac{7 \times 10}{8 \times 12 \times 16} - \ldots =$

यदि $x = \frac{1}{5} + \frac{1 \cdot 3}{5 \cdot 10} + \frac{1 \cdot 3 \cdot 5}{5 \cdot 10 \cdot 15} + \dots \infty$ है,तो $3x^2 + 6x$ का मान ज्ञात कीजिए।

$(1-4x)^{-4}$ के विस्तार में $13$ वाँ पद है

यदि $x=\frac{2}{5}+\frac{1 \cdot 3}{2 !}\left(\frac{2}{5}\right)^2+\frac{1 \cdot 3 \cdot 5}{3 !}\left(\frac{2}{5}\right)^3+\ldots$ है,तो $x+\frac{1}{x}=$

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