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