How would you do this integral?

[user098123]

I can't figure this one out, the integral is:

Int(1/sqrt(-2x-x^2))

 

[Jake...]

excuse me ?

 

[user098123]

Its calculus, maybe you'll learn it when you're older.

 

[freezed]

 

[user098123]

i plug it into my calculator and i get the arcsin(x+1), no idea how it gets that tho.

 

[vermontsteez]

lawl calc. is going to suck

 

[user098123]

i figured it out...-2x-x^2 is the same as 1-1-(-2x-x^2) which can also be rewritten 1-(1-(-2x-x^2)) which factors to 1-(x+1)^2, and then when you take the integral of 1/(1-(x+1)^2) you get sin^-1(x+1)

 

[user098123]

i forgot the square root in the integral, but aside from that i'm pretty sure its right.

 

[Greenish]

i just had a nice calc test. real fun

 

[Jake...]

maybe i would have used that "burn" in grade school to feel big.

i have taken calculus.

 

[clrumivier4life]

Yeah, you're right. I was just about to type all that out, thank god you already got it. I hate explaining math.

 

[Nihiriju]

haha i just had a second midterm for intergrals, i am pretty sure i failed, i hate math. 

 

[Dustin.]

don't think that was a burn bro. and if you had taken calc it should have been easy to figure that out.

but ya you got it right to the threadmaker. if you factor and rewrite its not to bad. you can also use a natural log but that doesn't make it much easier.

 

[Itsbackfliptime]

haha wait until you do double and triple integrals in Calc III.

I can't even remember how to do simple integrals.

 

[bobs]

simplify and it becomes sin rule i believe

 

[dman1260]

 

[Jamesl48]

Calculus is why I no longer want to pursue an engineering major

 

[ECGove]

haha nice

 

[clrumivier4life]

I didn't think double and triple integrals were all that hard. The hardest part was learning how to do simple integrals and then double and triples were just based off of those. Now differential equations...that's a tougher class.

 

[smuggsVT]

uhhhhhhhhhhhhhhhhhhhhhhhhhhh

 

[mmmmm...Pie]

Neither can I, but it's because it's been over a year since I've taken Calc 2. Being advanced in math does squat for you if nowhere in town offers higher than Calc 2.

 

[Itsbackfliptime]

yeah fuck diff eq. I took that at a community college so I wouldn't die.

 

[clrumivier4life]

Haha, i took calc 3 at community college. I wish I would have waited till summer to take diff. eq. there too. So gay.

 

[nitsua]

yeah i wish i was better at math

 

[WONTON]

i fucking raped my calc final yesterdayyyyy

 

[mad_540_trix]

i got fucking raped by my calc midterm a few weeks ago... 8/45. i'm taking calc at UBC with no calculus background from high school or college, so yeah, i'm getting owned.

 

[Forum*]

Intergration substitution with the letter U is way funner....

 

[user098123]

there is multiple substitutions involved in that problem, its a lot more advanced then regular u substitution

 

[pns513]

calculus is really stupid, once you get it, it's really easy though

 

[MistaFab]

hahah thats a clean 17% nice job

 

[clrumivier4life]

The basics are really easy but once you get to the really advance stuff it makes you want to kill yourself.

 

[*i<3snow*]

put your roots to powers of -1/2 so you can move it to the top. It makes getting the antiderivative 10x easier. That one looks like a bitch tho. I dont even want to attempt.

 

[Dustin.]

This stuff isn't so incredible, so stop making it sound amazing that we can do calculus. Thread is useless now that we answered the question.

 

[Casey]

you know a lot of people go to college for 7 years...

yeah, they're called, "doctors"

 

[mad_540_trix]

haha yes, yes, it is.

 

[mad_540_trix]

i'll probably only be here for 5 years, including co-op time, and i'll be something called a "geological engineer"....... the average salary of geological engineers in canada is about $122,500. seriously, i don't care how long it takes to do my degree, i fucking love it here, and i know that before i graduate i'll have a job lined up, and i'll probably be buying a damn nice car as a grad present for myself.