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TIMO - 2019 - Grade 7 - Preliminary Round - Paper 3 Question 14

TIMO · TIMO - 2019 - Grade 7 - Preliminary Round - Paper 3

Question 14

Given $x>0$ and $x+\frac1x=5$, find $x^4+\frac1{x^4}$.
  1. 529
  2. 441
  3. 625
  4. 527