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/sci/ - Science & Math

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File: 7 KB, 287x115, math.jpg [View same] [iqdb] [saucenao] [google]
7133939 No.7133939 [Reply] [Original]

hey /sci/ I don't understand this.

How does that step in the pic happen? How do you get "h" out of the square root like that?

>> No.7133952

You factor out h^2 from every term under the root. NB need assumption that h >0

>> No.7133955
File: 61 KB, 450x600, holt_algebra_1_book.jpg [View same] [iqdb] [saucenao] [google]
7133955

>>7133939
You can accomplish this with something called "Algebra." You can read more about it here.

>> No.7133960

>>7133939
you actually need to have a clue about mathematics first
i suggest middle school

>> No.7133962

Trick question, they don't specify where h nor r is.

>> No.7133974

>>7133952
My math vocabulary sucks, but with factor out you mean take a common multiplier? As in 6x + 12y = 6(x + 2y). I still don't get how you can do that since there is no "h" in r^2 term...

In my years of mathematics I have never seen this happen where you can take a common multiplier if one term doesn't have this before mentioned common multiplier.


But it would be sqr[h^2(1 + (r^2/h^2)] and then I just take square root from the h^2 and it becomes h.

So I can just divide every term with the "common multiplier" and that works? I wonder why the fuck they call it a "common multiplier" here, if it doesn't need to be common.

>> No.7133983
File: 67 KB, 900x900, angry_pepe.jpg [View same] [iqdb] [saucenao] [google]
7133983

>>7133974
highschoolers get out
dont make me reveal my power levels
REEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

>> No.7133985

Are you serious nigga?

Factoring out the h^2. Try and multiply the h back into the root of the 2nd equation and you get the 1st equation.

>> No.7133989
File: 9 KB, 238x211, abs_haram.jpg [View same] [iqdb] [saucenao] [google]
7133989

>>7133939

>> No.7133993
File: 340 KB, 600x583, 1fb.png [View same] [iqdb] [saucenao] [google]
7133993

>>7133983
>this guy probably lost his virginity in middle school while i still beat it to /d/ as a ripe 23 year old virgin
RRRRRRRREEEEEEEEEEEEEEEEEEEEEEEEE

>> No.7134002

Are you blind? can you not see r^2 has been factorised in the second equation?

>> No.7134006 [DELETED] 

>>7133974
<div class="math">\lim_{h \rightarrow \infty}\frac{hr}{r+\sqrt{h^{2}+r^{2}}}</div>
You do the fucking fraction sum
<div class="math">\lim_{h \rightarrow \infty}\frac{hr}{r+\sqrt{h^{2}+\frac{r^{2}h^{2}}{h^{2}}}}</div>
You fucking factor out the <span class="math">h^{2}[/spoiler]
<div class="math">\lim_{h \rightarrow \infty}\frac{hr}{r+\sqrt{h^{2}(1+\frac{r^{2}}{h^{2}})}}</div>
What is the square root of <span class="math">h^{2}[/spoiler]? That's right motherfucker: <span class="math">h[/spoiler], so you fucking get it out of that radical.
<div class="math">\lim_{h \rightarrow \infty}\frac{hr}{r+h\sqrt{1+\frac{r^{2}}{h^{2}}}}</div>
And there you fucking go, you goddamned inbred retard. Aren't you too smal to be on the internet anyways?

>> No.7134009

>>7133993
>>7133983
Please keep your silly frog memes on /r9k/. /sci/ is an academic board.

>> No.7134010

>>7134002
Are you blind? can you not see h^2 has been factorised in the second equation?

>> No.7134021

>>7134010
my bad but c'mon, I haven't even studied math passed GCSE level (inb4 britbong) and I get this.

OP needs to read a textbook.

>> No.7134036

>>7133939
Do you have a low IQ?

>> No.7134064

>>7133939
ayy lmao.

>> No.7134089

Why did everybody flip their shit about this?

I'm actually pretty good in math, I understand numbers easily.

But this shit has never been taught in my education history, in other words, I am at early level calculus and I have not yet seen this shit.

Checked from wikipedia what calculus actually consists of:
Differential [done]
Integral [done]
Series [done]
Vector[done]
Multivariable [not done]
Specialized [seems like I have done these too even though I have never heard those names]
(Fractional Malliavin Stochastic Variations)

I have done the basics of calculus, yet I have never fucking seen this kind of solution, ever. It isn't taught at least below university level mathematics in my country (inb4 shit country).

This is the first time I see this shit and you niggers go ape shit, I bet I would style on you newfags on math even though I just started doing this shit (I started studying math fo' real because I found out how good I am at it).

So eat shit baboons, you niggas & your board gay. Instead of trying to explain, you just throw ape shit at everybody. Implications...

>inb4 implications about my skills in math
>me > you
>everyday all day
>stylin on u

>> No.7134102

>>7133939
Theorem: <span class="math"> \sqrt{h^2+r^2} = h \sqrt{1+ \frac{r^2}{h^2}} [/spoiler]
Proof:
<span class="math"> \sqrt{h^2 + r^2} = \sqrt{h^2 + r^2 1}[/spoiler]
<span class="math"> \sqrt{h^2 + r^2} = \sqrt{h^2 + r^2 \frac{h^2}{h^2} }[/spoiler]
<span class="math"> \sqrt{h^2 + r^2} = \sqrt{h^2 \left( 1+ \frac{r^2}{h^2} \right) }[/spoiler]
<span class="math"> \sqrt{h^2 + r^2} = \sqrt{h^2} \sqrt{ 1+ \frac{r^2}{h^2} }[/spoiler]
<span class="math"> \sqrt{h^2 + r^2} = h \sqrt{ 1+ \frac{r^2}{h^2} }[/spoiler]

>> No.7134106

>>7134089
> pretty good at math
> can't do basic algebra

you just gotta fuck around with the equations until you get something that looks right.

>> No.7134107

You haven't encountered the square root function?

Cause that seems to be what's tripping you up.

>> No.7134108

>>7134089
>having passed all those shit
>How do you get "h" out of the square root like that?
all the more reason to kill yourself

>> No.7134114
File: 3.19 MB, 4128x3096, 20150316_183500.jpg [View same] [iqdb] [saucenao] [google]
7134114

Let me help u m8

Straight forward enough?

>> No.7134117

Please bear in mind, sqrt(h^2) = h IFF h≥0

Why can we perform the operation in the OP's pic? Because in the limit, h is going to positive infinity and is therefore greater than zero.

>> No.7134127
File: 296 KB, 500x375, 1419955984626.png [View same] [iqdb] [saucenao] [google]
7134127

>>7134114
>sqrt(13)
are you shitting me

>> No.7134132
File: 445 KB, 500x373, 1418883473139.gif [View same] [iqdb] [saucenao] [google]
7134132

>>7133939

>> No.7134136

>>7134127

I'm fo' Real.

>> No.7134139
File: 16 KB, 313x286, 1414196936464.jpg [View same] [iqdb] [saucenao] [google]
7134139

>>7134089
>can't into algebra 101
>calls everyone niggers and gays

>> No.7134147

>>7134102
this nigga out of all of you newfags can actually explain why it is so.

>> No.7134152

>>7134089
Low IQ poster confirmed

>> No.7134189

>>7134089
OP i hope for your sake you are trolling cause this is just pathetic

>> No.7134207

>>7134147
That nigger is actually the newfag because he responded to a question asking for help on a middle school problem in algebra.

>> No.7134836

>>7134089
OP's problem is not even about calculus, it's basic algebra.

Second, are you fucking telling me your calculus course didn't cover limits?

>> No.7134878
File: 37 KB, 320x320, 1426459073525.jpg [View same] [iqdb] [saucenao] [google]
7134878

>>7134009
well memed my friend

>> No.7134881

>>7134189
it is unimaginable that he isnt trolling
it is unfathomable that he cant solve this

>> No.7135582

>>7134089
kek
go back to high school nigger

>> No.7135590

>>7134089
If you've already done differentiating and integrating why the fuck do you care about the proof of the FTC?

>> No.7135664

>>7134089
Pls be pasta

>> No.7137075

>>7134089
huh i dont get it. im taking calc 1 and we just went over this stuff. weird. How did you not come across this?

>> No.7137097

>>7135664
It is now.