1 . n পূর্ন সংখ্যা হলে cos{2n+1)π+π/3}=?

• A. -1/2
• B. -1/√2
• C. ±1/2
• D.

Answer: Option A

Explanation:

2 . 2n+1

• A. 202
• B. 204
• C. 194
• D. 202

Answer: Option B

Explanation:

3 . 2n+1-2n= কত ?

• A. $2$
• B. $2^n$
• C. $4$
• D. $2^{n+1}$

Answer: Option B

Explanation:

4 . 3.2n-4.2n-22n-2n+1= কত ?

• A. $2^{n+1}$
• B. $2^{n-1}$
• C. $-2$
• D. $4$

Answer: Option C

Explanation: