Question

If x+ 1/x =3 then find the value of x³+1/x³​

Answer 1

Answer:

$\frac{x + 1}{x } = 3 \: \: \: \: then \: {x}^{3} + \frac{1}{ {x}^{3} } \\ so \: \\ x + 1 = 3x \\ 1 = 3x - x = 2x \\ so2x = 1 \\ x = \frac{1}{2} \\ x + \frac{1}{x} = (\frac{1}{2} + 2) = \frac{1 + 4}{2} = \frac{5}{2 } \\ then \: {x}^{3} + \frac{1}{ {x}^{3} } = ( \frac{ {5}^{3} }{2}) \\ {x}^{3} + \frac{1}{ {x}^{3} } = \frac{125}{8}$ yaar please mark me brainliest and if you are not able to understand then resend this question