Question

if X + 1 upon 8 is equal to 5 find the value of x cube + 1 upon x cube​

Answer 1

Answer:

Step-by-step explanation:

x+1/x=5--(1)

x^3+1/x^3=?

squaring (1) on both sides

x^2+1/x^2+2=25

x^2+1/x^2=23

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

=(5)(23-1)

=5*22=110