Question

if x - 1/x=1/3
evaluate x³-1/x³​

Answer 1

Answer:

x-1/x=1/3

x-1=x/3

(x-1)3=x

3x-3=x

3x-x=3

2x=3

x=3/2

substitute x value

(3/2)*3-1/(3/2)*3

27/8-1/27/8