Q63

Question:

If x + 1/x = 5, find x⁴ + 1/x⁴.

यदि x + 1/x = 5 हो, तो x⁴ + 1/x⁴ का मान क्या होगा?

Options:

  • a) 527
  • b) 527
  • c) 580
  • d) 543
  • a) 527
  • b) 529
  • c) 580
  • d) 543

correct answer : a)

Explanation:

x+1/x=5 → (x+1/x)²=25 → x²+1/x²=23. (x²+1/x²)²=529 → x⁴+1/x⁴=527.

x²+1/x² = 25-2 = 23। x⁴+1/x⁴ = 23²-2 = 527।

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