• A. ${}^{n}C_4$
• B. ${}^{n+1}C_4$
• C. ${}^{n+2}C_4$
• D. ${}^{n+2}C_3$

Answer: Option C

Explanation:

• A. ${}^{n}C_{r-n}$
• B. ${}^{n}C_{r+n}$
• C. ${}^{n}C_{n-r}$
• D. ${}^{n+1}C_n$

Answer: Option C

Explanation:

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

Answer: Option B

Explanation:

• A. $x^2-12=0$
• B. $x^2+12=0$
• C. $x^2-6=0$
• D. $x^2+6=0$

Answer: Option A

Explanation:

• A. বৃত্ত
• B. পরাবৃত্ত
• C. অধিবৃত্ত
• D. উপবৃত্ত

Answer: Option D

Explanation:

• A. 60π
• B. 10π
• C. π
• D. 4π

Answer: Option A

Explanation:

• A. $0$
• B. $-i$
• C. $-1$
• D. $1$

Answer: Option C

Explanation:

• A. $0$
• B. $-i$
• C. $-1$
• D. $1$

Answer: Option A

Explanation:

• A. $x^{-4}\ln x-2x^{-2}-3x^{-4}$
• B. $6x^{-4}\ln x-5x^{-4}$
• C. $6x^{-4}\ln x-2x^{-2}-3x^{-4}$
• D. $x^{-4}\ln x-2x^{-2}+3x^{-4}$

Answer: Option B

Explanation:

• A. $x^2\{1+3In(x\left)\right\}$
• B. $x\{5+6 In(x\left)\right\}$
• C. $11+6 In\left(x\right)$
• D. $\frac{6}{x}$

Answer: Option D

Explanation:

• A. $3$
• B. $-3$
• C. $-\frac{1}{3}$
• D. $0$

Answer: Option C

Explanation:

• A. 2x - y + 6 = 0
• B. 2x + y + 6 = 0
• C. x - 2y + 12 = 0
• D. x+ 2y - 12 - 0

Answer: Option D

Explanation:

• A. $3$
• B. $6$
• C. $8$
• D. $9$

Answer: Option D

Explanation:

• A. n!
• B. (n-1)!
• C. (n+1)!
• D. কোনটিই নয়

Answer: Option D

Explanation:

• A. $\frac{4}{1+4x^2}$
• B. $\frac{-4}{1-4x^2}$
• C. $\frac{4}{1-4x^2}$
• D. $\frac{1}{4x^2-1}$

Answer: Option A

Explanation: