Question

If x+1/x=7 find xcube + 1/xcube

Answer 1

Answer:

322

Step-by-step explanation:

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

7^3 = x^3+1/x^3 +3(7)

x^3+1/x^3 = 343- 21

x^3+1/x^3 = 322