BD Merit - Freelancing, BCS, Bank, Primary, Admission, NTRCA

Discuss Forum

1. $x - \frac{1}{x} = \sqrt{২}$

Answer: Option A

Explanation:

x - \frac{1}{x} = \sqrt{2} ∴ x + \frac{1}{x} = \sqrt{{(\sqrt{2})}^{2} + 4 . x . \frac{1}{x}} = \sqrt{6} ∴ x^{2} - \frac{1}{x^{2}} = \sqrt{6} X \sqrt{2} = \sqrt{12} = \sqrt{4 X 3} = 2 \sqrt{3}

Post your comments here:

Name:

Mobile:

Email:(Optional)

» Your comments will be displayed only after manual approval.