• A. $\frac{n\left(n+1\right)}{2}$
• B. $\frac{n\left(n+1\right)\left(2n+1\right)}{6}$
• C. ${\left\{\frac{n\left(n+1\right)}{2}\right\}}^2$
• D. একটিও নয়

Answer: Option C

Explanation:

• A. $1$
• B. $0$
• C. অনির্ণেয়
• D. $2$

Answer: Option B

Explanation:

• A. $0$
• B. $a$
• C. $1$
• D. অনির্নেয়

Answer: Option C

Explanation:

• A. $\frac{1}{3}$
• B. $2$
• C. $\frac{1}{2}$
• D. $4$

Answer: Option C

Explanation:

• A. $2$
• B. $4$
• C. $6$
• D. $8$

Answer: Option C

Explanation:

• A. $4$
• B. $6$
• C. $9$
• D. $8$

Answer: Option D

Explanation:

• A. ৩৬
• B. ৪৬
• C. ৬৩
• D. ৮১

Answer: Option D

Explanation:

• A. $1$
• B. $2^{n+1}$
• C. $3$
• D. $2^n$

Answer: Option B

Explanation:

• A. $\sqrt{5}$
• B. $1$
• C. $-\sqrt{5}$
• D. $\pm \sqrt{5}$

Answer: Option A

Explanation:

• A. $4$
• B. $5$
• C. $6$
• D. $7$

Answer: Option B

Explanation:

• A. $\log 8$
• B. $\log 27$
• C. $\log 5$
• D. $\log 10$

Answer: Option B

Explanation:

• A. $3^x$
• B. $3^x+2$
• C. $2^x-2$
• D. $2^x$

Answer: Option A

Explanation:

• A. $6/5$
• B. $\sqrt{\frac{5}{6}}$
• C. $5/6$
• D. $1/2$

Answer: Option C

Explanation:

• A. $\frac{1}{2}$
• B. $\frac{2}{3}$
• C. $\frac{1}{3}$
• D. $1$

Answer: Option C

Explanation:

• A. $-3$
• B. $-1$
• C. $1$
• D. $4$

Answer: Option B

Explanation: