/sci/ - Science & Math

[Anonymous No.4104563]

<span class="math">Final~coming~up[/spoiler]

[Anonymous No.4104566]

How do you write math equations in 4chan?

[Anonymous No.4104569]

<span class="math">\int_{0}^{-1} e^{\pi i} \ dx = 1[/spoiler]

[Anonymous No.4104576]

>Does not know how to greentext

How to greentext?

[Anonymous No.4104582]

>>4104569
Shouldn't it be?
<span class="math">\int_{0}^{-1} e^{\pi i} \ di = 1[/spoiler]

If not, it's just a constant (-1). -1 != 1

[Anonymous No.4104586]

>>4104582
integral from 0 to -1 != from -1 to 1

[Anonymous No.4104593]

>>4104586
<span class="math">e^{\pi \i}=-1[/spoiler]

If you integrate it on any interval, it equals -1.

[Anonymous No.4104594]

<span class="math">\int_{0.999...}^{1}\infty \, dx[/spoiler]

[Anonymous No.4104597]

>>4104586
<span class="math">e^{\pi i}=-1[\math]

If you integrate it on any interval, it equals -1.[/spoiler]

[Anonymous No.4104601]

>>4104586
<span class="math">e^{\pi i}=-1[/spoiler]

If you integrate it on any interval, it equals -1.

[Anonymous No.4104603]

>>4104594
>dx
>no x in the integrand

[Anonymous No.4104609]

>>4104601

[Anonymous No.4104607]

>>4104566
<span class="math">Like~pic~related.[/spoiler]

[resident /sci/ economist !!0CqB7P/574e No.4104605]

Recently I realized my math education is not up to snuf for someone in economics. I am on my way to becoming a math minor.

I signed up for Calculus with analytic geometry I today. Four credit class. Am I fucked? Is it hard stuff?

My education so far has been two semesters of "brief calculus."

[Anonymous No.4104620]

>>4104609
http://www.wolframalpha.com/input/?i=integrate+-1+from+0+to+-1

I see. It does equal 1.

[Anonymous No.4104626]

>>4104569
<span class="math">\int_{0}^{-1} e^{\pi i} \ dx = 1[/spoiler]
<span class="math">\int_{0}^{-1} -1 \ dx = 1[/spoiler]
<span class="math">-1(-1-0) = 1[/spoiler]
<span class="math">1 = 1[/spoiler]

Okay, NOW I'm doinitrite.

[Anonymous No.4104627]

>>4104569
>>4104582
>>4104594
>Calculus 1
>integration
nope.jpg

[Anonymous No.4104628]

>>4104605
You'll find it goes by pretty fast for how much you have to retain. Start early by watching Khan Academy videos under Calculus.

[Anonymous No.4104629]

>>4104627
OP here. Yes, it does cover the first chapter of integration.

>>4104626 can very well be on the final.

[resident /sci/ economist !!0CqB7P/574e No.4104633]

>>4104628

Okay thanks. 'will do.

[Anonymous No.4104638]

sqrt(x)y'=4xy+2y
All solotions

y'=dy/dx

[Anonymous No.4104642]

using permutation find the number of letters that can be arranged in:

opisafaggot

[Anonymous No.4104654]

>>4104566
<span class="math">/int{/frac{u mad im styling}{ on u}}[/spoiler]

[Anonymous No.4104658]

>>4104638
Like this?

<span class="math">\sqrt{x}y'=4xy+2y[/spoiler]
<span class="math">\frac{y''}{2\sqrt{x}}=4y+4xy'+2y'[/spoiler]
<span class="math">y''=\frac{4y+4xy'+2y'-\sqrt{x}y'}{2\sqrt{x}}[/spoiler]

Is that a differential equation? Out of my league. I could have done implicit differentiation with respect to x if y hadn't been primed in your post.

[Anonymous No.4104673]

>>4104638

Notice that it is separable. The rest is easy.

[Anonymous No.4104675]

Integrate:
\int sinx sin2x sin 3x \ dx

[Anonymous No.4104689]

>>4104675
<span class="math">\int \sin(x) \sin(2x) \sin(3x)~dx[/spoiler]
<span class="math">-\cos(x)(-2\cos(2x))(-3\cos(3x))+c[/spoiler]
<span class="math">-6~\cos(x)\cos(2x)\cos(3x)+c[/spoiler]

amidoinitrite

[Anonymous No.4104692]

>>4104689
oh wait, no i'm not
disregard that i suck cocks

[Anonymous No.4104712]

>>4104692
Yeah, never mind. Fuck that problem. Pic related.

[Anonymous No.4104739]

∫ln(x) dx=?
∫∫∫tanh(x*y*z) dx dy dz=?
show that: ∫ (d³δ(x-c)/dx³)*f(x) dx=f"'(c)
and ∑1/n²=π²/6

[Anonymous No.4104744]

If Faggot OP = X
and X =/= Faggot
Then what is OP?

[Anonymous No.4104757]

>>4104739
>not Latex

[Anonymous No.4104778]

<div class="math">∫ln(x) dx=?
∫∫∫tanh(x*y*z) dx dy dz=?
show that: ∫ (d³δ(x-c)/dx³)*f(x) dx=f"'(c)
and ∑1/n²=π²/6</div>

[Anonymous No.4104786]

<span class="math">∫ln(x) dx=?[/spoiler]
<span class="math">∫∫∫tanh(x*y*z) dx dy dz=?[/spoiler]
<span class="math">show~that:~∫ (d³δ(x-c)/dx³)*f(x) dx=f'''(c)[/spoiler]
<span class="math">and~∑1/n²=π²/6[/spoiler]

[Anonymous No.4104863]

today was my Calc II final... I am so screwed

[AL !yYNJ4o.o86 No.4104883]

>>4104786
wat the fuck is this? use
\int = <span class="math">\int [/spoiler]
\frac{1}{2} = <span class="math">\frac{1}{2} [/spoiler]
\times = <span class="math">\times [/spoiler]
\sum = <span class="math">\sum[/spoiler]

[Anonymous No.4104941]

What the fuck is this?

Calculus I?

WHO THE FUCK TAKES FUCKING CALCULUS I/II AT UNI? FUCK YOU /SCI/, YOU'RE ALL PSEUDOINTELLECTUAL FAGGOTS

[Anonymous No.4104959]

>>4104941
Who said I was in uni?

[Anonymous No.4104966]

>>4104863

lol I aced my calc 2 final after like 15 hours of straight studying. Seriously, the day before the final I didn't even know how to integrate shit, then I managed to learn it all by the next day and aced the final.

felt so goodman

[Anonymous No.4104972]

>>4104966
>calculus
>studying

[Anonymous No.4104978]

>>4104972

you're right, it was more like doing problems and reading the book, which is nothing like studying

[Anonymous No.4104988]

>>4104978
>doing problems
>needing to do practice problems in babby calc

>reading the book
>not doing proofs

[Anonymous No.4105134]

>>4104972
> calculus
> studying
> memorizing antiderivatives

[Anonymous No.4105137]

>>4105134
>memorizing
>math
pick one

[Anonymous No.4106083]

bump for problems

[Anonymous No.4106106]

>studying anything in calc
Well, I had to study a little to memorize the divergence tests, but that was only like 20 minutes.