Question

let (x+1/x)=3 Then find out the value of (x^3+1/x^3)?

Answer 1

Answer:

18 is your answer...

Step-by-step explanation:

$if \: \: x + \frac{1}{x} = 3 \\ \\ x {}^{3} + \frac{1}{x {}^{3} } = (x + \frac{1}{x}) {}^{3} - 3 \times x \times \frac{1}{x}(x + \frac{1}{x} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = (3) {}^{3} - 3 \times 3 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 27 - 9 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 18$

plz mark it as brainliest answer

Answer 2

Answer:

18 is the required answer