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

Answer: Option B

Explanation:

• A. $0$
• B. $\frac{1}{2}$
• C. $\frac{\sqrt{3}}{2}$
• D. $1$

Answer: Option C

Explanation:

• A. $\left\{1,5\right\}$
• B. $\left\{2\right\}$
• C. $\left\{\varnothing ,\left(2\right)\right\}$
• D. $\left\{\varnothing \right\}$

Answer: Option C

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. $8$
• B. $6$
• C. $4$
• D. $2$

Answer: Option C

Explanation:

• A. $\frac{a}{b}$
• B. $\log k\frac{a}{b}$
• C. $\log k\frac{b}{c}$
• D. $0$

Answer: Option D

Explanation: