Question

simplify by using identity if x+1/x=5, find the value x^3+1/x^3

Answer 1

Answer:

I hope it will help you.....

Answer 2

(x+1/x)^3= x^3 + 1/x^3 + 3(x+1/x)
(5)^3= x^3 + 1/x^3 + 3(5)
125= x^3 + 1/x^3 + 15

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

x^3 + 1/x^3 =110