$1 - \frac{3}{16} + \frac{1 \cdot 4}{1 \cdot 2} \left(\frac{3}{16}\right)^2 - \frac{1 \cdot 4 \cdot 7}{1 \cdot 2 \cdot 3} \left(\frac{3}{16}\right)^3 + \ldots$

  • A
    $\left(\frac{15}{6}\right)^{3/8}$
  • B
    $\left(\frac{4}{5}\right)^{2/3}$
  • C
    $\left(\frac{7}{4}\right)^{1/16}$
  • D
    $\left(\frac{4}{15}\right)^{-2/5}$

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$\frac{1+4x-3x^2}{(1+3x)^3}$ के पावर श्रेणी विस्तार में $x^3$ का गुणांक क्या है?

$1 + \frac{1}{4} + \frac{1 \times 3}{4 \times 8} + \frac{1 \times 3 \times 5}{4 \times 8 \times 12} + \dots = $

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

$\frac{1}{\sqrt[3]{(1-2 x)^2}}$ के विस्तार में $x^r$ का गुणांक क्या 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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