Question

$if \: x - \frac{1}{x} = \frac{1}{3} \\ evaluate \: {x}^{3} - \frac{1}{ {x}^{3} }$
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Answer 1

hey mate here is ur answer =

x-1/x=1/3

cubing both sides

(x-1/x)^3=x^3-1/x^3-3(x-1/x)

1/27=x^3-1/x^3-1

x³-1/x³=1/27+1=28/27.

hope it helps.

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