Question

if x+1/x=3 calculate x3+1/x3​

Answer 1

Step-by-step explanation:

x+1/x = 3

cube both sides :

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

x^3 + 1/x^3 + 3(x).(1/x).(x+1/x) = 27

x^3 + 1/x^3 + 3(3) = 27

x^3 + 1/x^3 = 18

Answer 2

Answer:

(x + I/x) 3=x^3x+3x + x/3+I/x3=27

27-3(x+1/x) = x3 +1/x3

27-3x3=x^3+I/X^3

18=x^3+1/x^3