If x- 1 x 2 -9- then the value of x3-1x3 is-

The correct option is B 18 ( x+ 1 x #160;) #160;^ 2 =9 ⇒ x+ 1 x =3 ( x+ 1 x #160;) #160;^ 3 =27 x ^ 3 + 1 x ^ 3 +3( ...

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Higher Order Derivatives

If x+ 1 x ...

Question

If ${(x + \frac{1}{x})}^{2} = 9$ , then the value of $x^{3} + \frac{1}{x^{3}}$ is-

18

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