• A. $\frac{1}{25}$
• B. $-5$
• C. $\frac{1}{5}$
• D. $-\frac{1}{5}$

Answer: Option B

Explanation:

• A. $a>0,a\not\equiv 1$
• B. $a<0,a\not\equiv 1$
• C. $a>1,a\not\equiv 0$
• D. $a<1,av0$

Answer: Option A

Explanation:

• A. $\frac{2}{5}$
• B. $\frac{5}{2}$
• C. $\frac{7}{4}$
• D. $\frac{11}{2}$

Answer: Option B

Explanation:

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

Answer: Option A

Explanation:

• A. 4
• B. 3
• C. 2
• D. 1

Answer: Option B

Explanation:

• A. $9$
• B. $16$
• C. $27$
• D. $64$

Answer: Option D

Explanation:

• A. $8$
• B. $5$
• C. $4$
• D. $3$

Answer: Option C

Explanation:

• A. ${16}^x$
• B. $4^{4x}$
• C. $2^{2x+2}$
• D. $2^{8x}$

Answer: Option C

Explanation:

• A. 8
• B. 3
• C. 5
• D. 4

Answer: Option D

Explanation:

• A. $\frac{7}{3}$
• B. $3$
• C. $\frac{8}{3}$
• D. $2$

Answer: Option D

Explanation:

• A. $1,0$
• B. $1,10$
• C. $1,100$
• D. $10,100$

Answer: Option C

Explanation:

• A. $0.01$
• B. $0.001$
• C. $0.05$
• D. $0.005$

Answer: Option A

Explanation:

• A. $-81$
• B. $81$
• C. $\pm 81$
• D. $\pm 27$

Answer: Option B

Explanation:

• A. 4
• B. 8
• C. 5
• D. 7

Answer: Option B

Explanation:

• A. 1
• B. 4
• C. 2
• D. 5

Answer: Option B

Explanation: