Question

x+1/x=3 find x^3+1/x^3

Answer 1

Answer:

x+1/x=3

=>x+1=3x

=>2x=1

=>x=1/2

x^3+1/x^3

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

=1/8+8

=8.125

Answer 2

x + 1/x =3

x+1 =3x

2x=1

x =1/2

Now put this value in finding statement ,

x^3 +1/x^3

= 1/2×1/2×1/2 + 1/2×1/2×1/2

=7