Question

6. Which of the following is the value of (x+

1/x)²?

1. x² +1/x²

III. X²+1/x²+2

IV. x²+1/x² + 2x

Answer 1

Answer:

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Answer 2

$x²+1/x²+2$

$using \: formula \: \\ (a + b)^{2} = {a}^{2} + {b}^{2} + 2ab \\ \\ (x + \frac{1}{x} ) = {x}^{2} + \ { (\frac{1}{x} })^{2} + 2x \times \frac{1}{x} \\ \\ = {x}^{2} \: + {(\frac{1}{x}) }^{2} + 2$

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