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1 - \frac{1}{18} - \frac{1}{18} . \frac{1}{36} - \frac{1}{18} . \frac{1}{36} . \frac{3}{54} - . . . = ?

\frac{2}{\sqrt{5}}

\frac{2 \sqrt{2}}{3}

\frac{3 \sqrt{3}}{5}

\frac{5}{3 \sqrt{3}}

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ANS : 5

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