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1. x=4 +3

  • A. 53
  • B. 53
  • C. 53
  • D. 53

Answer: Option B

Explanation:

x = √4+√3

1/x = (√4-√3)/(4-3)= √4-√3

x+1/x = 2√4 = 4

Now,

x3+1/x3 = (x+1/x)3 – 3 . x . 1/x (x + 1/x)

= 43 – 3×4

= 64 - 12

= 52

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