Question

If x-1/x=4,then find the value of x^3+1/x^3

Answer 1

x = 1
/x = 4

$1^{3} + 1 / 4^{3}$

$1 + 1/ 64$

$2/64$

Answer 2

x+1/x = 4

x³ + 1/x³ = (x + 1/x)³ - 3 (x + 1/x)
              = 64 - 12
              = 52