Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

dinainjune

  • 4 years ago

if x + 1/x = 5 how about x^3 + 1/ x^3 ?

  • This Question is Closed
  1. saifoo.khan
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    o.O

  2. dinainjune
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the question is this \[x^{3} + 1/ x^{3}\]

  3. him1618
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    cube x + 1/x

  4. him1618
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    (x + 1/x )^3 = 125 = x^3 + 1/x^3+ 3x + 3/x 125 = x^3 + 1/x^3 + 3(x+1/x) 125 = x^3 + 1/x^3 +15 hence x^3 + 1/x^3 = 110

  5. dinainjune
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    cube ?

  6. dinainjune
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Thanks !

  7. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy