A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

If integral from 0,2 (2x^3-kx^2+2x)dx=12, then k must be? I've tried working it out several times but I still don' get the right answer.

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

    \[\int\limits_{}^{?}\]

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

    \[ int_{0}{2} \]

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

    \[\int\limits_{0}^{2} (2x^3-kx^2+2k) dx =12\]

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

    \[\int\limits_{0}^{2} 2x^3 - kx^2 + 2k = 12 \]

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

    = 2x^4/4 - kx^3/3 +2kx from 2 to 0 , = 12

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

    2(2^4)/4 - k(2^3)/3 + 2(k)(2) - [ 0 + 0 + 0 ] = 12

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

    did you get that so far?

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

    yeah... instead of adding one to the power I was just finding the derivative..

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

    well we are integrating, correct

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

    give me a medal

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

    yeah :) thanks... let me see if i get it now

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

    Got it :)

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

    :)

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

    hey can u help me in another one real quick? sorry

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

    ok

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

    \[\int\limits_{}^{} (\sec^2x)(\tan ^2x)dx=\]

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

    u = tan x

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

    du = sec^2 x

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

    so you do u sub?

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

    yep

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

    ok thanks

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

    so i got integral u^2 du

  23. 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

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.