BD Merit - Freelancing, BCS, Bank, Primary, Admission, NTRCA

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1. $১ + ৩ + ৩^{২} + ৩^{৩} + ৩^{৪} +$

A. $\frac{৩^{n}}{2}$
B. $\frac{৩^{n}}{2}$
C. $\frac{৩^{n}}{2}$
D. $\frac{৩^{n}}{2}$

Answer: Option B

Explanation:

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