Question

Find the value of x3 - 1/x3 if x2 +1/x2=2.

Answer 1

Answer:

0

(x-1/x)^2=x^2+1/x^2-2

            =2-2

            =0

x-1/x=0

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

              =0

hope it helps.