21question....... Please
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Step-by-step explanation:
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Step-by-step explanation:
Given, x + 1/x = 3
Squaring both sides,
(x + 1/x)² = 3²
= x² + 1/x² + 2 = 9
= x² + 1/x² = 7
Squaring again,
(x² + 1/x²)² = 7²
= x⁴ + 1/x⁴ + 2 = 49
= x⁴ + 1/x⁴ = 47
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