Question

x+1/x=7 ,
then what will be
x³+1/x³=?​

Answer 1

Answer:

see the attached document for the steps

Answer 2

cubing both sides

(x+1)^3 / x^3 = 343

x^3 + 1/x^3 + 3 (1 +1/x ) = 343

x^3 + 1/x^3 + 3*7 = 343

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

x^3 + 1/x^3 = 322

Step-by-step explanation: