Question

If x+1/x = 5, find x^3 - (1/x)^3​

Answer 1

Step-by-step explanation:

x+1/x=5

x+1=5x

5x-x=1

4x=1

x=1/4

then,

x³-(1/x)³

=(1/4)³-(4)³

=(1/4+4)(1/4²-1/4×4+4²)

=1+16/4(1/16-16)

=17/4×(1-256/16)

=17/4×255/16

=4335/64

=67.73

Answer 2

Step-by-step explanation:

Refer to the attachment!......!!!