Question

if X + 1 by x is equal to 7 find x cube + 1 by x cube​

Answer 1

Answer:

322

Step-by-step explanation:

x+1/x =7

cubing on both sides

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

x^3+1/x^3+3(7)=343

x^3+1/x^3 =343-21 =322