Question

x+1/x=5 of then find the value of, x power 3 + 1/x power3

Answer 1

Answer:

110

Step-by-step explanation:

x+1/x=5

cubing on both sides,

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

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

x^3+1/x^3=110

Answer 2

Answer:

110

Step-by-step explanation:

[x + (1/x)]^3=125

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

= 125 - 15 = 110