\( 1+\frac{1}{3}+\frac{1 \cdot 3}{3 \cdot 6}+\frac{1 \cdot 3 \cdot 5}{3 \cdot 6 \cdot 9}+\frac{1 \cdot 3 \cdot 5 \cdot 7}{3 \cdot 6 \cdot 9 \cdot 12}+-----\infty \) ধারাটির যোগফল কত?

A \( \sqrt{\frac{5}{3}} \)

B \( \frac{2}{\sqrt{3}} \)

C \( \frac{\sqrt{3}}{2} \)

D \( \sqrt{3} \)

Solution

Correct Answer: Option D

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