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यदि $x - \frac{1}{x}$ = 4 हो, तो $(x + \frac{1}{x})$ बराबर होगा -

1
$5 \sqrt{2}$
2
$2 \sqrt{5}$
3
$4 \sqrt{2}$
4
$4 \sqrt{5}$

Answer:- 2

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