x2 – 2 + \(\frac{1}{x^2}\) = ……………. A) (x – \(\frac{1}

1.	x2 – 2 + \(\frac{1}{x^2}\) = ……………. A) (x – \(\frac{1}{x}\))2 B) (\(\frac{1}{x}\) – 3)2 C) (3x – \(\frac{1}{x}\))2D) None
Answer» Correct option is A) (x – \(\frac{1}{x}\))² Correct option is (A) \((x-\frac1x)^2\) \(x^2-2+\frac1{x^2}\) \(=x^2-2\times x\times\frac1x+(\frac1{x})^2\) = \((x-\frac1x)^2\)

x2 – 2 + \(\frac{1}{x^2}\) = ……………. A) (x – \(\frac{1}{x}\))2 B) (\(\frac{1}{x}\) – 3)2 C) (3x – \(\frac{1}{x}\))2D) None

Answer»

Correct option is A) (x – \(\frac{1}{x}\))²

Correct option is (A) \((x-\frac1x)^2\)

\(x^2-2+\frac1{x^2}\) \(=x^2-2\times x\times\frac1x+(\frac1{x})^2\)

= \((x-\frac1x)^2\)