• A. ১
• B. $৭-৪\sqrt{৩}$
• C. $২+\sqrt{৩}$
• D. $\frac{১}{২-\sqrt{৩}}$

Answer: Option B

Explanation:

• A. x ≤ 7
• B. x ≥ 7
• D. x = 7

Answer: Option B

Explanation:

• A. 2,3
• B. -5,1
• C. -2,3
• D. 1,-5

Answer: Option A

Explanation:

• B. 1
• C. 2
• D. 3

Answer: Option A

Explanation:

• A. 28
• B. -44
• C. 32
• D. 26

Answer: Option A

Explanation:

• A. 10
• B. ∞
• C. 100
• D. 1

Answer: Option A

Explanation:

• A. $\ln x$
• B. $\ln 2x$
• C. $x^2$
• D. $2x$

Answer: Option C

Explanation:

• 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. 120°
• B. 140°
• C. 110°
• D. 130°

Answer: Option C

Explanation:

• A. $\frac{1}{x}$
• B. $\frac{1}{x}{\log }_{10}e$
• C. $\frac{1}{x}\log 10$
• D. ${\log }_{10}e$

Answer: Option B

Explanation:

• A. $-1$
• B. $1/2$
• C. $0$
• D. $1$

Answer: Option B

Explanation:

• A. $\sin \theta$
• B. $\cos \theta$
• C. $\tan \theta$
• D. $cot\theta$

Answer: Option B

Explanation:

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

Answer: Option A

Explanation:

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

Answer: Option A

Explanation:

• A. $a^2+\frac{1}{a^2}$
• B. $\frac{1}{2}(a^2+\frac{1}{a^2})$
• C. $\frac{1}{4}(a^2+\frac{1}{a^2})$
• D. $2(a^2+\frac{1}{a^2})$

Answer: Option B

Explanation: