Question

x+1/x=5(x not equal to 0) then find x³+1/x³​

Answer 1

Answer:

Step-by-step explanation:

$x + \frac{1}{x} = 5$

$x^3 + \frac{1}{x^3} +3(x+ \frac{1}x}) = 125$                                         (cubing both sides)

$x^3 + \frac{1}{x^3} +3*5 = 125$

$x^3 + \frac{1}{x^3} +15 = 125$

$x^3 + \frac{1}{x^3} = 110$

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