Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

roselin

evaluate indefinite integrals integral squareroot x^4/ x^3-1 dx

  • one year ago
  • one year ago

  • This Question is Closed
  1. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    what is it ?

    • one year ago
  2. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    thanks

    • one year ago
  3. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    is the x^3-1 in the sqrt also or no ??

    • one year ago
  4. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    yes, it is.

    • one year ago
  5. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    |dw:1355676028137:dw|

    • one year ago
  6. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    okay,

    • one year ago
  7. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    now, use int by subs let u=x^3-1 du = 3x^2 dx or x^2 dx = 1/3 du continue it.....

    • one year ago
  8. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    -1/3 intergral 1/ sqrt of u * du

    • one year ago
  9. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    miss (-) sign, how come this ?

    • one year ago
  10. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    i took du as -3x^2

    • one year ago
  11. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    derivative of x^3 is 3x^2, right ?

    • one year ago
  12. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    yes

    • one year ago
  13. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    so, why becomes (-) ?

    • one year ago
  14. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    well, i wrote the problem as 1-x^3 instead of x^3 -1

    • one year ago
  15. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    lol, hahaha...

    • one year ago
  16. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    hmm

    • one year ago
  17. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    so, the original problem is over x^3-1 or 1-x^3 ?

    • one year ago
  18. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    it is x^3 -1

    • one year ago
  19. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    ok, therefore the integration can be |dw:1355676826761:dw|

    • one year ago
  20. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    i just gave u +c :), for the rest let try it

    • one year ago
  21. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    u= x^3 -1 here

    • one year ago
  22. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    yes

    • one year ago
  23. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    because i have saw ur problem is .... over x^3-1, but experiment gave u 1-x^3

    • one year ago
  24. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    i know

    • one year ago
  25. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    and i put it in the wolfram thing, got some different ans

    • one year ago
  26. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    what's the result of int above, dont use wolfram first

    • one year ago
  27. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    (u) ^-1/2 +1/ -1/2+1

    • one year ago
  28. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    where is the 1/3 ?

    • one year ago
  29. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    (x^3-1)+c

    • one year ago
  30. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    What do I do with that 1/3?

    • one year ago
  31. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    can you please write down the whole problem and show how it works, if you do not mind then

    • one year ago
  32. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    i am kind of confused

    • one year ago
  33. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    |dw:1355677696473:dw|

    • one year ago
  34. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    got it ?

    • one year ago
  35. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    how did u get that 2u?

    • one year ago
  36. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    1/(-1/2 + 1) = 1/(1/2) = 1 * 2/1 = 2 right ?

    • one year ago
  37. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah, sorry

    • one year ago
  38. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    i have another problem, will you guide me through that one? i will try solving it and show it to you.

    • one year ago
  39. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    nopes... now, subtitute back that u=x^3-1 so, the answer be 2/3 (x^3-1)^(1/2) + c or 2/3*sqrt(x^3-1) + c

    • one year ago
  40. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    wolfram is same with the answer above :)

    • one year ago
  41. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    k.

    • one year ago
  42. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    okay

    • one year ago
  43. roselin
    Best Response
    You've already chosen the best response.
    Medals 0

    thank you.

    • one year ago
  44. RadEn
    Best Response
    You've already chosen the best response.
    Medals 2

    very welcome

    • one year ago
    • Attachments:

See more questions >>>

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.