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

Answer: Option B

Explanation:

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

Answer: Option C

Explanation:

• A. 35.5
• B. 72
• C. 71
• D. 36

Answer: Option A

Explanation:

• A. $49 \pi / 3$
• B. $36\pi$
• C. $15 \sqrt{2\pi }$
• D. $3 \sqrt{2\pi }$
• E. None

Answer: Option B

Explanation:

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

Answer: Option B

Explanation:

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

Answer: Option B

Explanation:

• A. $\frac{\sqrt{5}}{2}$
• B. 3/5
• C. 4/3
• D. 5/4

Answer: Option A

Explanation:

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

Answer: Option A

Explanation:

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

Answer: Option D

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:

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

Answer: Option A

Explanation:

• A. $\frac{1}{6}$
• B. 6
• C. $\sqrt{6}$
• D. $\frac{1}{\sqrt{6}}$

Answer: Option D

Explanation:

• A. $3$
• B. $\frac{1}{2}$
• C. $6$
• D. $9$

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. $12/5$
• B. $13/12$
• C. $25/144$
• D. $-\frac{13}{12}$

Answer: Option B

Explanation: