• A. $\frac{n-1}{n+1}$
• B. $\frac{2n}{n+1}$
• C. $\frac{1}{n}$
• D. $\frac{n}{n+1}$

Answer: Option D

Explanation:

• A. ৯তম পদ
• B. ১০ তম পদ
• C. ১১ তম পদ
• D. ১২ তম পদ

Answer: Option A

Explanation:

• A. ৯ তম পদ
• B. ১০ তম পদ
• C. ১১ তম পদ
• D. ১২ তম পদ

Answer: Option A

Explanation:

• A. 256
• B. 258
• C. 254
• D. 252

Answer: Option A

Explanation:

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

Answer: Option A

Explanation:

• A. $a^2+b^2$
• B. $a^2-b^2$
• C. ${(a+b)}^3$
• D. ${(a-b)}^3$

Answer: Option D

Explanation:

• A. -4
• B. 3
• C. -3
• D. 4

Answer: Option C

Explanation:

• A. ৯
• B. ১১
• C. ১২
• D. ১৩

Answer: Option D

Explanation:

• A. $\frac{1}{\sin A}$
• B. $1$
• C. $\frac{1}{\cos A}$
• D. $\frac{1}{\tan A}$

Answer: Option C

Explanation:

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

Answer: Option A

Explanation:

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

Answer: Option A

Explanation:

• A. 4/10
• B. 4/11
• C. 5/10
• D. 5/11

Answer: Option B

Explanation:

• A. $0$
• B. $1$
• C. $2$
• D. $12$

Answer: Option B

Explanation:

• A. $2a^2{b}^2$
• B. $2b^2$
• C. $2ab$
• D. $2a^2$

Answer: Option B

Explanation:

• A. ${10}^5$
• B. ${10}^6$
• C. ${10}^7$
• D. ${10}^8$

Answer: Option D

Explanation: