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/sci/ - Science & Math

Page 2

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File: 175 KB, 1296x778, fun!.jpg [View same] [iqdb] [saucenao] [google] [report]

Hey All, thought up of a problem and gave it to some math teachers. None of them could solve it. The problem is in the image.

I hope people find different ways to get to the solution, so once you find it show me it! Explain it!

Extra Info:
The actual question is what is the 10th number in the sequence. Warning, it is big. Really big.

26 replies omitted. Click Reply to view.
 >> Anonymous Mon Jan 16 00:39:44 2017 No.8606241 >>8606125g(n+1)=g(n)*(n+1)+1,g(0)=1n | g(n)0 | 11 | 22 | 53 | 164 | 655 | 3266 | 19577 | 137008 | 1096019 | 98641010 | 9864101http://oeis.org/A000522http://www.wolframalpha.com/input/?i=++g%28n%2B1%29%3Dg%28n%29*%28n%2B1%29%2B1%2Cg%280%29%3D1)
 >> Chizmar Mon Jan 16 00:42:19 2017 No.8606247 >>8606209How did you get that?
 >> Anonymous Mon Jan 16 00:48:19 2017 No.8606258 >>8606158I think this one is still wrong because it has a 4 drawn in.I think your problem seems like a small discrete mathematics problem. You might enjoy reading a book on the subject.I wish they taught discrete mathematics in high school.
 >> Anonymous Mon Jan 16 01:02:21 2017 No.8606280 >>8606241uh, if g(n+1)=g(n)*(n+1)+1,g(0)=1then g(1)=(2)*1+1 => g(1)=3???
 >> Anonymous Mon Jan 16 01:16:19 2017 No.8606302 >>8606280if n =0g(0+1)=g(0)*(0+1)+1g(1)=1*1+1=2

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Do you find it regrettable that scientific studies based on race are defacto banned? Good luck finding funding to analyse the difference between the brain of an East Asian and the brain of a Negro.

 >> Anonymous Sun Jan 15 23:41:36 2017 No.8606121 >>8606117Same here dude. Personally, race is the only thing on my mind 24/7 so to see it so tragically understudied in the sciences makes my blood boil.
 >> Anonymous Mon Jan 16 00:02:36 2017 No.8606162 It is currently the greatest tragedy in modern science, after the subjugation of climate change truthers.
 >> Anonymous Mon Jan 16 00:46:30 2017 No.8606255 >>8606117They aren't banned, and are actually pretty common.But /pol/tards aren't going to allow reality to get in the way of their persecution fetish.

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Engineers and computer scientists can code programs for fun or play with electronics in their spare time but what can I, as a biochemistry student, do as a hobby?

 >> Anonymous Sun Jan 15 23:34:26 2017 No.8606108 Taxidermy.
 >> Anonymous Mon Jan 16 00:08:07 2017 No.8606174 >>8606100synthesize synthesizesynthesize
 >> Anonymous Mon Jan 16 00:17:20 2017 No.8606198 >>8606100Cure cancer
 >> Anonymous Mon Jan 16 01:45:11 2017 No.8606357 >>8606100Let food sit in a jar and get moldy

File: 25 KB, 513x210, sci.png [View same] [iqdb] [saucenao] [google] [report]

The variables $t,k$ are the coordinates $(t,k)$ of the vertex.
Finding $k$ I can find $t$.
I wanted to find $t$ first, translating the parabola and imposing it to be symmetric.
It doesn't seem to work though.

3 replies omitted. Click Reply to view.
 >> Anonymous Mon Jan 16 00:04:48 2017 No.8606170 >>86061532 is not the x-coordinate of the vertex
 >> Anonymous Mon Jan 16 00:28:53 2017 No.8606222 *$(x+2)^{2}=x^{2}+4x+2$.>>8606170>2 is not the x-coordinate of the vertexYeah, you're right.$t=-2$ in my example so I guess I missed a minus.I see that you can rewrite the parabola as $y=a(x-t)^{2}+k$.Still I'd like to know If I can find $t$ from the idea in>>8606153.
 >> Anonymous Mon Jan 16 00:36:38 2017 No.8606235 >>8606222$t = -\frac{b}{2a}$Like, what else do you want?
 >> Anonymous Mon Jan 16 00:55:08 2017 No.8606267 >>8606235>t=−b2aYou don't say?It's $y(f_{t}(x))=y(f_{t}(-x))$ the right condition and it works.Imposing $(x+t-2)^{2}=(-x+t-2)^{2}$ I find $t=2$.Indeed $x\mapsto x-2$ makes $(x+2)^{2}$ symmetric.I only need to have a better look at what I wrote in order to keep the sign of $t$ is consistent.
 >> Anonymous Mon Jan 16 00:57:14 2017 No.8606270 File: 12 KB, 571x117, sci_1.png [View same] [iqdb] [saucenao] [google] [report] >>8606267Fucking hell.

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What does the future hold in store for life on earth?

 >> Anonymous Sun Jan 15 22:39:22 2017 No.8606021 Pic related
 >> Anonymous Sun Jan 15 22:57:25 2017 No.8606041 probably some cool stuff too bad we won't be around to see it.

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Is it the circle, for being unique? The triangle, for its architectural strength?

 >> Anonymous Sun Jan 15 22:10:32 2017 No.8605973 >>8605954The general quadratic form
 >> Anonymous Sun Jan 15 22:28:46 2017 No.8606004 The hexagon and decagon, because if both are inscribed in a circle and added together, the line is magically cut in extreme and mean ratio.Shapes, man.
 >> Anonymous Sun Jan 15 22:33:41 2017 No.8606011 >>8605954klein bottle
 >> Anonymous Sun Jan 15 22:37:43 2017 No.8606016 >>8605954fractal timewave
 >> Anonymous Sun Jan 15 23:04:53 2017 No.8606054 >>8605954My dick.

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What's the science behind uncommonly large breasts?

Is it a natural or artificial selection thing, or just luck of the draw?

4 replies omitted. Click Reply to view.
 >> Anonymous Mon Jan 16 02:10:45 2017 No.8606397 >>8606244No, it just makes you a faggot. Or a pedo. Or a combination
 >> Anonymous Mon Jan 16 02:19:00 2017 No.8606409 >>8606190>Men sexually select women with larger breasts because it makes them look fertile and able to provide lots of nourishment to offspring.It's another episode of Evolutionary conjecture!
 >> Anonymous Mon Jan 16 02:29:11 2017 No.8606421 >>8605937progesteronethere's a reason that teens like tits and grown men are more attracted to the backside. progesterone makes big tits, estrogen makes big hips.
 >> Anonymous Mon Jan 16 02:49:53 2017 No.8606446 File: 40 KB, 375x705, Venus_von_Willendorf_01.jpg [View same] [iqdb] [saucenao] [google] [report] >>8606264>It's probably a fairly recent thing...."recent" as in 25,000 years ago?
 >> Anonymous Mon Jan 16 02:54:38 2017 No.8606455 breast /sci/ence is best /sci/ence>>8605252

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What is the best book to understand logics?
I want something very complete, with lots of stuff.

thanks /sci/

 >> Anonymous Sun Jan 15 21:51:23 2017 No.8605934 bump
 >> Anonymous Sun Jan 15 21:52:26 2017 No.8605936 "complete"+ pic relatednice joke
 >> Anonymous Sun Jan 15 21:56:35 2017 No.8605946 nice post, have a bump
 >> Anonymous Sun Jan 15 22:01:18 2017 No.8605959 where are the books?
 >> Anonymous Sun Jan 15 22:04:24 2017 No.8605963 good post>no replies/pol/ bait post>tons of replies

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How reputable is forensic science, /sci/? Is it an actual, rigorous, established field? Or is it just a way to artificially inflate the credibility of the court?

 >> Anonymous Sun Jan 15 21:26:35 2017 No.8605896 >>8605890Forensic science involving a bunch of different things. They tend to vary significantly in terms of rigor.
 >> Anonymous Sun Jan 15 21:29:05 2017 No.8605903 >>8605896So which are rigorous and which aren't?
 >> Anonymous Sun Jan 15 21:34:17 2017 No.8605916 >>8605903Depends on the investigator. You're basically just asking 'how corrupt are cops"Forensic science can be very good, or it could have a corrupt cop behind it.
 >> Anonymous Sun Jan 15 21:35:06 2017 No.8605920 >>8605903forensic counselors are probably on the lower end of rigor
 >> Anonymous Mon Jan 16 00:17:17 2017 No.8606197 >>8605903I hear fingerprints aren't as conclusive as most believe.

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Why is it that we don't dump rainwater into depleted aquifers? It's a naturally formed reservoir, we wouldn't have to make dams, only a few pipelines into it, maybe using preexisting wells. It can prevent land from sinking that results from depleted aquifers as well.

The only things I can think of as reasons not to pump into aquifers is that if any water is chemically or biologically contaminated it may ruin whatever pristine water remains in the aquifer, farmers in the valley would get mad about not being able to freely pump however they please, depending on whatever restrictions may hypothetically be implemented, and you can't sell an aquifer as a recreation space like you can with an above ground reservoir.

but overall, could something like this be feasible or wise? what do you guys think?

 >> Anonymous Mon Jan 16 03:50:10 2017 No.8606553 >>8605869>pump into aquifers...from where? The problem in the coastal cities of California is the lack of rainfall collection, due to the failure 85 years ago to plan for its huge increase in population, and mass conversion of farmland to industial and residential use.
 >> Anonymous Mon Jan 16 04:19:57 2017 No.8606593 File: 258 KB, 992x673, 7BLA5K.jpg [View same] [iqdb] [saucenao] [google] [report] In a year or so there may be a nice piece of freshwater to harvest and tow elsewhere.

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perform function(humanity)

humanity = (you+me) - suffering

Create function (reduce suffering)

REPEAT

GOTO: SIMON

AND THIS NIGGA ONCE AGAIN DROPS THE MIX/MIC

What ya donna do with the flavor reggae-reg?

BECOME SIMON! OR WE WILL HAVE TO KILL YOU WITH KINDNESS!

Beep boop.
HAHHAHA I doxxed that cunt Simon! Found him! He's a useless autistic living off governments funds! LOOOOSEEEEER!

Who will find me first now?

Hell. Simon.

END_FUNCTION

2 replies omitted. Click Reply to view.
 >> Anonymous Sun Jan 15 21:26:37 2017 No.8605897 http://knowyourmeme.com/memes/safety-not-guaranteedSimon function(name)Hello world.
 >> Anonymous Sun Jan 15 22:02:06 2017 No.8605961 >>8605860bump for autism
 >> Anonymous Sun Jan 15 22:09:11 2017 No.8605970 >>8605860I hope the memory of this self-embarrassment keeps you awake tonight.
 >> Anonymous Sun Jan 15 22:11:32 2017 No.8605976 >>8605860Topkek embarssing cunt.
 >> Anonymous Sun Jan 15 22:22:24 2017 No.8605996 >>8605860You're living on government funds? Fuck, I hadn't realized this by now. You lost the small bit of sympathy that I had remaining for you. Off yourself.

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Aging and Life Prolonging Processes, Ward Dean

 >> Anonymous Sun Jan 15 21:05:26 2017 No.8605845 Holy shit you are worse than Heaven
 >> noko Sun Jan 15 21:07:32 2017 No.8605852 >>8605845Who?
 >> noko Sun Jan 15 21:31:29 2017 No.8605909 bump
 >> Anonymous Sun Jan 15 21:34:08 2017 No.8605915 >>8605841Libgen.rus
 >> noko Sun Jan 15 22:01:43 2017 No.8605960 >>8605915Thank you!

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Has anyone read On Conics? What a dense work this is. The definition of a hyperbola is complex indeed.

8 replies omitted. Click Reply to view.
 >> Anonymous Sun Jan 15 23:01:47 2017 No.8606049 >>8606043And how.Look, don't take this the wrong way, but you don't exactly exude the air of intelligence into my thread.
 >> Anonymous Sun Jan 15 23:01:58 2017 No.8606050 >>8606038I agree.
 >> Anonymous Sun Jan 15 23:03:55 2017 No.8606052 >>8606049Why don't you stick to reddit or lesswrong then? You clearly don't belong here.
 >> Anonymous Sun Jan 15 23:21:45 2017 No.8606087 >>8606052Why? Because I'm not negative?Absolutely ridiculous. Cultures change, retard. Ive seen this place go from avidly atheist to creationist almost overnight.
 >> Anonymous Mon Jan 16 00:48:50 2017 No.8606259 >>8606087well yeah atheism is subjective as hellthe bible says god created the world, a fact. when you see the world objectively, god created the world, because that is a fact, thus creationism is more rational than evolution

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How much energy would it take to theoretically break up a Hadron?

If so, how much energy would be released by such an act? I feel due to the nature of the strong force, it would be immense.

 >> Anonymous Sun Jan 15 21:07:20 2017 No.8605849 >>8605746go check with RHIC or something

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Pol here to ask a question. What does this mean for politics?

20 replies omitted. Click Reply to view.
 >> Anonymous Mon Jan 16 04:45:50 2017 No.8606617 >>8606341Last year I had a course in macroeconomics that used the notation. In that course we mainly focussed on growth rates, so it saves a lot of writing.
 >> Anonymous Mon Jan 16 04:46:30 2017 No.8606618 >>8605713top left is childish and inconvenient outside of a certain situation (few multiple derivatives of a variable)top right is pedantic and you would never use it unless you are actually doing a proofbottom left is relatively goofy but the easiest solutionbottom right is the most proper and logical format in the vast majority of situations
 >> Anonymous Mon Jan 16 04:56:48 2017 No.8606628 >>8605713>Pol here to ask a question. What does this mean for politics?What it means is that you are seeing if we focus on:1. The colors2. The math symbols3. The labeling of the axes
 >> Anonymous Mon Jan 16 05:01:10 2017 No.8606631 >>8606618>top left is childish and inconvenient outside of a certain situation (few multiple derivatives of a variable)Why is it inconvenient?
 >> Anonymous Mon Jan 16 05:02:14 2017 No.8606633 File: 195 KB, 1920x1080, 1480153098634.jpg [View same] [iqdb] [saucenao] [google] [report] >>8605838Oh god, I feel quite guilty now for replying in a /pol/-bait thread, but this is just too fucking funny.The picture literally says that all politics is essentially the same and you rampant faggots still desperately look for a way to say:>B-b-bbutt MY retardedly judgmental point of view is WAY better than this other arbitrary ideology.I rate 9/11, /pol/.Can't make this shit up.

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Why do the retards on /pol/ think climate change isn't real?

The pseudo-science circlejerk mixed with batshit conspiracy theorists is palpable.

40 replies omitted. Click Reply to view.
 >> Anonymous Sun Jan 15 23:48:53 2017 No.8606134 >>8606084From wiki itself!https://en.wikipedia.org/wiki/List_of_Wikipedia_controversiesWith regards to something like man made climate change, with taxes already imposed and many more set to be imposed along with very powerful political and religious organizations on board and no gain for "deniers" to get into edit wars, you are going to get an extremely biased view.Wiki is good for anything that is not controversial. An anonymous shitposting image board like this however is great for all things controversial.
 >> Anonymous Sun Jan 15 23:52:07 2017 No.8606140 >>8606134how does any of this have to do with skepticism/denialism?
 >> Anonymous Mon Jan 16 00:04:39 2017 No.8606168 It's real, but any attempt at addressing it would raise the price of energy and therefore lower the quality of life of people today. Considering even with our attention climate change is still going to suck in the future, I think it's preferable to plan to radically adjust our lifestyles in the future and enjoy cheap energy now rather than radically adjust our lifestyles now and never enjoy that cheap energy, but no one who thinks global warming exists says that, so I let the denialism slide.
 >> Anonymous Mon Jan 16 00:11:51 2017 No.8606180 >>8606168The problem with that mindset is that we can't adapt to a moving target. Global warming isn't a binary thing that is either avoided or happens full force, its a spectrum of consequences. Carrying on without reducing emissions won't just make things bad - it will force things too keep getting worse and worse until emissions decrease.Better we start winding down emissions now, in an intentional and controlled way, than we leave the task up to nature.
 >> Anonymous Mon Jan 16 02:21:59 2017 No.8606413 >>8606140You posted the wiki link to climate change denial? You tell me. The page is heavily biased and unbalanced. It even has a section on media driven climate change denial campaigns? lol please...we have all been inundated relentlessly with pro man made climate change propaganda from our media for more than one generation now, almost to the point where man made climate doom is implicated in every storm, drought or weather anomaly.>>8606168>radically adjust our lifestyles now and never enjoy that cheap energyWell the plan is not about leaving that energy unspent, it is about who gets to spend it and I am sure it will be radical. Good thing you believe you are responsible for the climate change though because it will make those radical plans easier to swallow should you find yourself on the short end of that stick. If you are shitposting here I am afraid that's where you will be.

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11 replies omitted. Click Reply to view.
 >> Anonymous Sun Jan 15 22:31:05 2017 No.8606007 >>8606006do it. i'll be surprised if it won't crash.
 >> Anonymous Sun Jan 15 22:34:13 2017 No.8606013 >>8606007So would Bill Gates, I'm sure.
 >> Anonymous Sun Jan 15 23:00:40 2017 No.8606044 OP here. I doubt anyone's waiting on the edge of their seat for this, but if you are, I'd (very roughly) estimate seven more hours to finish. Could be a lot more, given the increasing intervals between primes... hell, depending on how the isprime function works, it could already be in an infinite loop. If it's still going in twelve hours, I'll kill it and see what it got to.
 >> Anonymous Sun Jan 15 23:27:24 2017 No.8606095 i determined the result using a sieve of eratosthenes in C3.4332861011375368>>8606044your program will never terminate
 >> Anonymous Mon Jan 16 03:48:44 2017 No.8606548 >>8606044haven't been into programming lately but i think your inner while loop will never end

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