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

  • A
    $\sqrt[3]{\frac{4}{7}}$
  • B
    $\sqrt[3]{\frac{4}{7}} - \frac{3}{4}$
  • C
    $\sqrt[3]{\frac{4}{7}} + \frac{3}{4}$
  • D
    $\sqrt[3]{\frac{7}{4}} - \frac{3}{4}$

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$217$ का घनमूल क्या है?

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