Question

If x = 3 + underroot8, find x4 + 1/x4​

Answer 1

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Answer 2

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Step by step explanation;

1. Rationalize the denominator of 1/x
2. Find x+1/x
3. Find x2 + 1/x2
4. Find x4 + 1/x4 in the same way you found x2 + 1/x2