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

Denebel

how do I integrate (3)/(x^2 + 9) dx using partial fractions? Thank you.

  • 2 years ago
  • 2 years ago

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

    you don't need partial fractions .. assume x = 3 tany .. then substitute .. you would get get 1/3 taninv(x/3) as your answer...

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

    srry u wd get taninv(x/3) as answer..

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

    what happens to the 1/3?

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

    the coefficient?

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

    ..And how can you know to assume a tan. function?

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

    you can assume the tan function because you change the coordinates. .. see integration is nothing but area under the curve .. when you integrate f(x) in x you find area under the curve for when f(x)is plotted in xy plane.. when i write x = tany I am calculating area for the same graph in a different plane .. value of my area would remain the same... I hope this helps

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

    Kind of, can you elaborate some more?

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

    check this website ... http://www.sosmath.com/calculus/integration/substitution/substitution.html

    • 2 years 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.