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

Answer: Option B

Explanation:

• A. $-2\le x\le 0$
• B. $0\le x\le 2$
• C. $-2\le x\le 2$
• D. $-4\le x\le 4$

Answer: Option C

Explanation:

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

Answer: Option C

Explanation:

• A. 2N
• B. 3N
• C. 5N
• D. 7N

Answer: Option C

Explanation:

• A. $\frac{3}{5}$
• B. $\frac{4}{5}$
• C. $\frac{5}{4}$
• D. $\frac{4}{3}$

Answer: Option A

Explanation:

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

Answer: Option C

Explanation:

• A. $০.১°$
• B. $০.১১$
• C. $০.১১°$
• D. $১.০১$

Answer: Option A

Explanation:

• A. $1$
• B. $-1$
• C. $\pm 1$
• D. $0$

Answer: Option D

Explanation:

• A. ১
• B. ৩
• C. ৬
• D. ৯

Answer: Option B

Explanation:

• A. $r=x\left(1\pm \sqrt{2}\right)$

Answer: Option A

Explanation:

• A. db
• B. nm
• C. ml
• D. cm

Answer: Option A

Explanation:

• A. 2
• B. 1
• C. 3
• D. 4

Answer: Option A

Explanation:

• A. ১০
• B. ২০
• C. ১৫
• D. ২৫

Answer: Option C

Explanation:

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

Answer: Option C

Explanation:

• A. 0,2
• B. 1,1
• C. -1,3
• D. -3,-4

Answer: Option B

Explanation: