Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing

This Question is Closed

waterineyesBest ResponseYou've already chosen the best response.0
Linear by Quadratic...
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
But, how exactly am I supposed to do this one?
 one year ago

waterineyesBest ResponseYou've already chosen the best response.0
If you put ax2 + bx + c = y then it helps or not??
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
uhh... what about the top  we just substitute using the quadratic formula in that case?
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
Sorry guys, I'm not even sure where to start with this integral. I can't find it in my book either >.<
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
bring everything on the bottom to the top... then integration by parts?
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
uhh  I'm not sure that will work >.<
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
All the related integrals had something to do with trig sub and inverse trig functions, but i can't find this case.
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
I know what the answer is (from an integral table), and it's logarithmic+trigonometric. I have no idea where to start though
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
http://integraltable.com/downloads/singlepageintegraltable.pdf #16, btw
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
ahhh that got me thinkin... let me take another look
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
well log came from 1/x
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
that looks like a big u sub
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
Uh, got any ideas where to start htough?
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
just by the looks w/o really thinking about it, it looks like they let the bottom = u
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
lol nvm i thought the second half was the next step
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
thats a tricky one i need a piece of paper for that one lol
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
okay lol. Thanks for helping :P
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
http://www.wolframalpha.com/input/?i=int+x%2F+%28ax2+%2B+bx+%2B+c%29
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
that way is crazzyyyy tho lol
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
lol  but the answer is different from the integral table :S the result is too complicated lol. I'm using some constants for the integral that will make it even more nasty x.x
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
its the same just written different
 one year ago

experimentXBest ResponseYou've already chosen the best response.3
x = 1/2(2x + b/a)  1/2 (b/a) make two fractions ... and use the usual approach
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
^^^ thats what w.a did too
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
Okay. any way to reduce it to the form seen in the integral table?
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
once i substitute my values in, it is still an intermediate result  I still have to do two more substitutions, and I'm not sure I can do the algebra without going insane.
 one year ago

experimentXBest ResponseYou've already chosen the best response.3
one is going to be log another ... complete squares (a+sqrt(b/4a))^2  (b/4ac)
 one year ago

experimentXBest ResponseYou've already chosen the best response.3
this is in standard form ... you should be able to evaluate this.
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
Wait, I can do it by completing the square as well?
 one year ago

experimentXBest ResponseYou've already chosen the best response.3
\[ \frac1{2a}\frac{x + b/a}{x + b/a x+c/a}  \frac1{2a}\frac{ b/a}{(x + \sqrt{b/4a})^2  (b/4ac/a)}\]
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
oh wow. this integral  sqrt(tan x)  is a freaking pain...
 one year ago

experimentXBest ResponseYou've already chosen the best response.3
quite a bit ... assuming c/a > b/4a
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
yea just about all realistic functions are either extremely tedious or impossible to solve by hand. When it comes to practical application, we usually just have computers solve or approximate the solution.
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
Ugh, I give up. I'm tired of this integral lol. I'll look into it more tomorrow. Thanks though, @experimentX and @eyust707
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
thats when the mathematicians come in handy =P
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
yw inky.. you taking calc 2 over the summer??
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
I'm trying to finish calc 3 and linear algebra and diff equations over the summer >.<
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
that is a lot of material to learn!!
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
Yea, hopefully I can finish it.
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
I got faith!! where about are you in diffs?
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
Haven't even started LOL
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
well, I skimmed the variables seperatble and the first order linear ODE I think
 one year ago

experimentXBest ResponseYou've already chosen the best response.3
It's just a substitution ... reduces to the form \[ \int \frac1 {x^2 + a^2}dx\] or, \[ \int \frac 1{x^2  a^2}dx\] assuming first, wolf calculates 2/a arctan(x/a)
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
yea seps will seem very natural
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
linear first order with the integrating factor is tricky to understand at first... but easy to do
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
youll prob see frustrating word problems but dont let them scare you.. they always work out to be quite simple
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
alright  I have to learn how to integrate these nasty partial fractions first though haha :P
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
haha just remember, If your integrating with respect to y , all the other variables are constant!
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
keep repeating that in your head as you run through your derivative..
 one year ago

eyust707Best ResponseYou've already chosen the best response.1
pretend that all the other letters are just numbers and youll be golden!
 one year ago

dpaIncBest ResponseYou've already chosen the best response.0
didn't you see what i last posted earlier inky?
 one year ago

inkyvoydBest ResponseYou've already chosen the best response.0
uhh what did you post?
 one year 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.