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1. $x - \frac{1}{x} = 3$

A. 11
B. 11
C. 11
D. 11

Answer: Option A

Explanation:

দেওয়া আছে,

x - \frac{1}{x} = 3

আমরা জানি,

x^{2} + \frac{1}{x^{2}} = (x - \frac{1}{x})^{2} + 2 x \frac{1}{x} = 3^{2} + 2 = 9 + 2 = 11

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