Question

if x+1/x=3√3 ,then find x³+1/x³​

Answer 1

Step-by-step explanation:

x+1/x=3√3

cube both side

(x+1/x)^3 = (3√3)^3

x^3 + 1/x^3 + 3(x+1/x) = 81√3

x^3 + 1/x^3 + 3× 3√3 =81√3

x^3 + 1/x^3 = 81√3- 8√3 = 73√3