Question

if x + 1/x = 5
how about
x^3 + 1/ x^3 ?

Answer 1

o.O

Answer 2

the question is this \[x^{3} + 1/ x^{3}\]

Answer 3

cube x + 1/x

Answer 4

(x + 1/x )^3 = 125 = x^3 + 1/x^3+ 3x + 3/x

125 = x^3 + 1/x^3 + 3(x+1/x)
125 = x^3 + 1/x^3 +15

hence
x^3 + 1/x^3 = 110

Answer 5

cube ?

Answer 6

Thanks !