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SSC Selection Post 2024 PYQ — Question 53

SSC Selection Post - Graduation Level - 26 June 2024 - Shift 3 • Quantitative Aptitude • Q53

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If x + 1x1\over x = 15, then the value of (x2+1x2)\left( x^2+{1\over x^2} \right) is:

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Correct answer: B

Explanation

The correct answer is option 2 i.e. 223.

(x2+1x2)\left( x^2+{1\over x^2} \right) = (x + 1/x)2 - 2

= 152 - 2

= 223