If x² + 1/x²=14 then x-1/x=
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X² + 1/x² = 14 (x + 1/x)² -2.x.1/ x = 14 (x + 1/x )² -2 = 14 (x + 1/x )² = 16 take square root both sides (x + 1/x) = 4 then, x³ + 1/ x³ ...
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