• A. -2
• B. 4
• C. -4
• D. -3

Answer: Option D

Explanation:

• A. 1
• B. 2
• C. -1
• D. -2

Answer: Option C

Explanation:

• A. 1
• B. 2
• C. -1
• D. -2

Answer: Option C

Explanation:

• A. 1
• B. x
• C. (1-x)
• D. (1+x)

Answer: Option D

Explanation:

• A. $1$
• B. $x$
• C. $\left(1-x\right)$
• D. $\left(1+x\right)$

Answer: Option D

Explanation:

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

Answer: Option D

Explanation:

• A. $\left(1+a-b\right)\left(1-a+b\right)$
• B. $\left(1+a+b\right)\left(1-a+b\right)$
• C. $\left(1+a+b\right)\left(1-a-b\right)$
• D. $\left(1-a+b\right)\left(1-a-b\right)$

Answer: Option A

Explanation:

• A. (1+a+b)(1-a+b)
• B. (1+a+b)(1-a-b)
• C. (1+a+b)(1+a-b)
• D. (1+a-b)(1-a+b)

Answer: Option D

Explanation:

• A. $-2<x<1$
• B. $-1<x<0$
• C. $0<x<1$
• D. $-1<x<1$

Answer: Option C

Explanation:

• A. 5
• B. 10
• C. 9
• D. 7

Answer: Option A

Explanation:

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

Answer: Option C

Explanation:

• A. 1
• B. -1
• C. 1/p
• D. (p-1)

Answer: Option D

Explanation:

• B. 1
• C. $\sqrt{2}$
• D. i

Answer: Option B

Explanation:

• A. $\tan \frac{p}{2}$
• B. $\cot \frac{p}{2}$
• C. $\cos \frac{p}{2}$
• D. $\sin \frac{p}{2}$

Answer: Option B

Explanation:

• A. $\left(1-x\right)\left(1-7x\right)$
• B. $\left(1+x\right)\left(1+7x\right)$
• C. $\left(1+x\right)\left(1-7x\right)$
• D. $\left(1-x\right)\left(1+7x\right)$

Answer: Option D

Explanation: