Question

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

Answer 1

Step-by-step explanation:

given

x+1/x=4

=>(x^2+1)/x=4

=>x^2-4x+1=0

by doing completing square method,we get

x=2+-(√3)

(x^3-1)/x^3=(15√3+25)/(15√3+26) or (-15√3+25)/(-15√3+26)

Answer 2

The Answer is in Attachment

Hope it Help you