Math, asked by swarupas45458, 9 months ago

21question....... Please

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Answered by umapreethy

1

Answer:

Step-by-step explanation:

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Answered by manas3379

2

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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