• A. $\frac{1}{2}\left(x-4\right)\left(x+2\right)$
• B. $\frac{1}{2}\left(x+4\right)\left(x-2\right)$
• C. $\frac{1}{2}\left(x+4\right)\left(x+2\right)$
• D. $\frac{1}{2}\left(x-4\right)\left(x-2\right)$

Answer: Option D

Explanation:

• A. $\frac{1}{30}$
• B. $\frac{1}{60}$
• C. $\frac{1}{15}$
• D. কোনোটিই নয়

Answer: Option C

Explanation:

• A. π ঘন মি.
• B. $\frac{\mathrm{\pi }}{3}$ঘন মি.
• C. $\frac{\mathrm{\pi }}{9}$ঘন মি.
• D. $\frac{\mathrm{\pi }}{27}$ঘন মি.

Answer: Option D

Explanation:

• A. $30$
• B. $15$
• C. $45$
• D. $60$

Answer: Option A

Explanation:

• A. 45
• B. 81
• C. 90
• D. 135

Answer: Option D

Explanation:

• A. 45
• B. 81
• C. 90
• D. 135

Answer: Option D

Explanation:

• A. 100
• B. 160
• C. 200
• D. Try your self

Answer: Option D

Explanation:

• A. $S_{\infty }= \frac{20}{3}$
• B. $S_{\infty }= \frac{3}{20}$
• C. $S_{\infty }= 20$
• D. $S_{\infty }= 3$

Answer: Option B

Explanation:

• A. $\frac{1}{2}$
• B. $\frac{2}{8}$
• C. $\frac{3}{8}$
• D. $\frac{2}{4}$

Answer: Option C

Explanation:

• A. 5
• B. 2
• C. -2
• D. 4

Answer: Option A

Explanation:

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

Answer: Option A

Explanation:

• A. 1
• B. 2
• C. 4
• D. 7.52

Answer: Option D

Explanation:

• A. $2-\frac{2}{x^2-y^2}$
• B. $2-\frac{2x}{x^2-y^2}$
• C. $\frac{2}{x^2-y^2}$
• D. $\frac{2x}{x^2-y^2}-2$

Answer: Option D

Explanation:

• A. $\left(-\alpha ,1\right)\cup \left(1,+\alpha \right)$
• B. $\left(-\alpha ,0\right)\cup \left(0,\alpha \right)$
• C. $\left(-\alpha ,\frac{1}{3}\right)\cup \left(\frac{1}{2},\alpha \right)$
• D. $\left(-\alpha ,\frac{1}{2}\right)\cup \left(\frac{1}{2},\alpha \right)$

Answer: Option D

Explanation:

• A. $\frac{3}{2}$
• B. $\frac{2}{3}$
• C. $\frac{5}{2}$
• D. $\frac{2}{5}$

Answer: Option A

Explanation: