1 . a2+1a2=51

• A. $\pm 1$
• B. $\pm 7$
• C. $\pm 5$
• D. $\pm 3$

Answer: Option B

Explanation:

2 . a-1a=3

• A. 14
• B. 16
• C. 11
• D. 12

Answer: Option C

Explanation:

3 . a2+1a2=2, a-1a =?

• A. 3
• B. 0
• C. 1
• D. 2

Answer: Option B

Explanation:

4 . a-1a=4

• A. 22
• B. 18
• C. 16
• D. 14

Answer: Option B

Explanation:

5 . a-1a=3

• A. 7
• B. 9
• C. 11
• D. 13

Answer: Option C

Explanation:

6 . a-1a=3

• A. 18
• B. 30
• C. 36
• D. 54

Answer: Option C

Explanation:

7 . a-1a=3

• A. 18
• B. 24
• C. 36
• D. 42

Answer: Option C

Explanation:

8 . a-1a=5

• A. 20
• B. 23
• C. 25
• D. 27

Answer: Option D

Explanation:

9 . a-1a=8

• A. 60
• B. 66
• C. 68
• D. 70

Answer: Option B

Explanation:

10 . a-1a=3

• A. 7
• B. 9
• C. 11
• D. 13

Answer: Option C

Explanation:

11 . a-1a=2

• A. 14
• B. 12
• C. 16
• D. 18

Answer: Option A

Explanation:

12 . a-1a=3

• A. 7
• B. 9
• C. 11
• D. 13

Answer: Option C

Explanation:

13 . a-1a=3

• A. 11
• B. 12
• C. 14
• D. 16

Answer: Option A

Explanation:

14 . 1-1-a-1a-1÷a-1a-1

• A. $-\frac{1}{a}$
• B. -1
• C. 0
• D. $\frac{1}{a}$

Answer: Option C

Explanation:

15 . a4-51a2+1=0

• A. $\pm 9$
• B. $\pm 7$
• C. $\pm 5$
• D. $\pm 3$

Answer: Option B

Explanation:

16 . a-1a=3

• A. ৯
• B. ১৮
• C. ২৭
• D. ৩৬

Answer: Option D

Explanation: