If $x+\frac{1}{x}=2$, then $x^3+\frac{1}{x^3}=$ ?

1 8 2 0

2

If $x+\frac{1}{x}=2$  $x^3+\frac{1}{x^3}=$ Put x = 1 $1^3+\frac{1}{1^3}$ = 2