Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
how do I integrate (3)/(x^2 + 9) dx using partial fractions? Thank you.
 2 years ago
 2 years ago
how do I integrate (3)/(x^2 + 9) dx using partial fractions? Thank you.
 2 years ago
 2 years ago

This Question is Closed

shaan_iitkBest ResponseYou've already chosen the best response.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

shaan_iitkBest ResponseYou've already chosen the best response.0
srry u wd get taninv(x/3) as answer..
 2 years ago

DenebelBest ResponseYou've already chosen the best response.0
what happens to the 1/3?
 2 years ago

DenebelBest ResponseYou've already chosen the best response.0
..And how can you know to assume a tan. function?
 2 years ago

shaan_iitkBest ResponseYou've already chosen the best response.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

DenebelBest ResponseYou've already chosen the best response.0
Kind of, can you elaborate some more?
 2 years ago

shaan_iitkBest ResponseYou've already chosen the best response.0
check this website ... http://www.sosmath.com/calculus/integration/substitution/substitution.html
 2 years ago
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
 Engagement 19 Mad Hatter
 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.