Question

If X + 1 by x is equal to 5
then find the value of x cube + 1 by x cube

Answer 1

xcube+1/xcube=x cube + 1 cube/x cube=

(x+1/x)cube=5 cube=125

therefore answer is 125

Answer 2

Answer:

Step-by-step explanation:

x+1/x=5

cubing on both sides

x^3+1/x^3+3x*1/x(x+1/x)=125

x^3+1/x^3+3*1*5=125

x^3+1/x^3=125-15

x^3+1/x^3=110