Question

if x+1/x =2, then x³+1/x³= 64,14,8,2​

Answer 1

Answer:

(x + 1/×)^3 = (2)^3

x^3 + 1/x^3 + 3*x*1/ (x + 1/x) = 8

x^3 + 1/x^3 + 3 (2) = 8

x^3 + 1/x^3 + 6 = 8

x^3 + 1/x^3 = 8 - 6

x^3 + 1/x^3 = 2