Question

find the root of x+1/x=7
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Answer 1

Answer:

hello

Step-by-step explanation:

$\frac{x + 1}{x} = 7 \\ + 1 = 7 \\ 7 - 1 = 6$

ok

Answer 2

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♧Question♧

• find the root of x+1/x=7

♧Answer♧

By taking square root on b/s.

• ( x+1/x )² = ( 7 )²
• (x)² + 2(x)(1/x) + (1/x)² = 49
• x² + 2 + 1/x² = 49
• x² + 1/x² = 49 - 2
• x² + 1/x² = 47

By taking cube root on b/s.

• ( x+1/x )³ = ( 7 )³
• (x)³+ 3(x)(1/x)(x+1/x) + (1/x)³ = 343
• x³ + 3(7) + 1/x³ = 343
• x² + 21 + 1/x² = 343
• x³ + 1/x³ = 343 - 21
• x³ + 1/x³ = 322

Answer:-

• x² + 1/x² = 47
• x³ + 1/x³ = 322

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