$\frac{1}{(2 + x)^4} = $

  • A
    $\frac{1}{2}\left( 1 - 2x + \frac{5}{2}x^2 - \dots \right)$
  • B
    $\frac{1}{16}\left( 1 - 2x + \frac{5}{2}x^2 - \dots \right)$
  • C
    $\frac{1}{16}\left( 1 + 2x + \frac{5}{2}x^2 + \dots \right)$
  • D
    $\frac{1}{2}\left( 1 + 2x + \frac{5}{2}x^2 + \dots \right)$

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Similar Questions

If $x = \frac{1 \cdot 3}{3 \cdot 6} + \frac{1 \cdot 3 \cdot 5}{3 \cdot 6 \cdot 9} + \frac{1 \cdot 3 \cdot 5 \cdot 7}{3 \cdot 6 \cdot 9 \cdot 12} + \ldots$ to infinite terms,then $9x^2 + 24x = $

If $\alpha = \frac{5}{2! \times 3} + \frac{5 \times 7}{3! \times 3^2} + \frac{5 \times 7 \times 9}{4! \times 3^3} + \ldots$,then $\alpha^2 + 4\alpha =$

The coefficient of ${x^n}$ in the expansion of ${(1 - 9x + 20{x^2})^{-1}}$ is

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The sum of the series $\frac{3}{4 \cdot 8} - \frac{3 \cdot 5}{4 \cdot 8 \cdot 12} + \frac{3 \cdot 5 \cdot 7}{4 \cdot 8 \cdot 12 \cdot 16} - \dots$ is:

${\left( {\frac{a}{{a + x}}} \right)^{\frac{1}{2}}} + {\left( {\frac{a}{{a - x}}} \right)^{\frac{1}{2}}} = $

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