1 . x2-2x-1=0

• A. $4$
• B. $2\sqrt{2}$
• C. $4\sqrt{2}$
• D. $8$

Answer: Option B

Explanation:

2 . x+1x=-5

• A. $\frac{1}{4}$
• B. $4$
• C. $-4$
• D. $-\frac{1}{4}$

Answer: Option D

Explanation:

3 . x+1x=3

• A. 2
• B. 4
• C. 0
• D. 6

Answer: Option C

Explanation:

4 . x+1x=3

• A. $\sqrt{3}-2$
• B. $1$
• C. $5$
• D. $7$

Answer: Option B

Explanation:

5 . x+1x=2

• A. 0
• B. -2
• C. -3
• D. -1

Answer: Option A

Explanation:

6 . x+1x=5

• A. $1$
• B. $3\sqrt{5}$
• C. $5$
• D. $2\sqrt{5}$

Answer: Option D

Explanation:

7 . x+1x=2

• A. $2$
• B. $4$
• C. $27$
• D. $64$

Answer: Option A

Explanation:

8 . x+1x=4

• A. 147
• B. 52
• C. 70
• D. 76

Answer: Option D

Explanation:

9 . x+1x=5

• A. $5$
• B. $2$
• C. $5\sqrt{2}$
• D. $2\sqrt{5}$

Answer: Option D

Explanation:

10 . x+1x=2

• A. 2
• B. 8
• C. 4
• D. 1

Answer: Option D

Explanation:

11 . x+1x=2

• A. 2
• B. 1
• C. $\frac{1}{2}$
• D. $\frac{1}{4}$

Answer: Option B

Explanation:

12 . x+1x=2

• A. 1
• B. 2
• C. 3
• D. 8

Answer: Option B

Explanation:

13 . x2-3x+1=0

• A. 3
• B. 2
• C. 5
• D. 8

Answer: Option A

Explanation:

14 . x+1x=3

• A. 16
• B. 18
• C. 22
• D. 1

Answer: Option B

Explanation:

15 . cosθ=12x+1x

• 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:

16 . ∫115x+2x+1x+3dx=কত? 

• A. 4
• B. 2
• C. 6
• D. in 6

Answer: Option D

Explanation:

17 . x+1x=0

• A. i
• B. -i
• C. $\pm 2i$
• D. (A) and (B)

Answer: Option D

Explanation:

18 . fx=2x+1x-3

• A. R
• B. $\left(3,\infty \right)$
• C. $\left(-\infty .3\right)$
• D. $R-\left\{3\right\}$

Answer: Option A

Explanation: