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Archived threads in /sci/ - Science & Math - 431. page

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I'm 20 and my mother is 57. Both of us have low platelet count, (her's is about 90 and mine ranges from 100-115 since 2013). My doctor is concerned, but I haven't bruised in years or noticed any other related symptoms.
I am generally healthy.

Just wondering if I should get this checked out or if it's no big deal.
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>inb4 /adv/
In other words, are low platelets a cause of concern in humans?
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>>8964377
Fucking platelets when will they learn
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>>8964408
Yes they are. A little cut can generate a big hemorrhage and kill you.

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What's the scientific explanation for the fact that people seem to be massively more intelligent nowadays than a couple of centuries before? Back then the majority of people were religious and though that monarchy was a good idea. What changed? Is it nutrition?
9 posts and 1 images submitted.
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>>8964352
People have to work less so they study more.
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>>8964352
what's wrong with monarchy and religion?
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Hope this isn't a serious question.

π/π = 1
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>>8964191
How many half a cake goes into half a cake?

Answer: 1

Pic unrelated.
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>>8964191
Define π
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>>8964215
π:=3

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For me, its gotta be Kimtech Science Brand Kimwipes
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my underwear
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>>8964010
Are these multipurpose?

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Will interpreting ever be threatened by machines? Interpreting has been an essential job since the development of diplomacy. But with the invention of google translate and other software. Will human translators be getting the boot for computer ones? Sure, if any of you have any experience with a second language you'll know that google cant translate long text well. It's better for short sentences. It doesn't understand slang and takes no account regional dialects. It also translates incredibly formally.
5 posts and 1 images submitted.
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It will go the same way conducting trains or flying commercial planes went after they could be reliably automated. Interpreters will only be there to correct terrible mistakes or otherwise supervise while the computer does almost everything on its own.
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>>8963936
yes, very soon
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>>8964093
What about when talking person to person. If trump is in one chair and Putin is in another. If I speak russian and english I can hear trump talk and tell Putin what trump said probably as fast as a computer can

Sup senpai. I'm doing some recombinant mapping on some crosses I made and for this paper and I need to know which arm my two genes are on. The two alleles are on the x chromosome, with the genes being yellow and vermillion.

Here's yellow: http://flybase.org/reports/FBgn0004034.html

Here's vermillion: http://flybase.org/reports/FBgn0003965.html

If anyone is familiar with flybase or just familiar with reading genomic data, can you tell me where it says the arm each gene is located on?

Also, I was figuring I could just check to see which base pairs correspond to which arm, and then see where my gene is and figure it out that way, but I assumed the database should have it, and I'd like to know where it is so in the future I don't have to do that. Thanks.

pic related its just some data
1 posts and 1 images submitted.
No replies in the DB for this post!

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Suppose we have a function [math] f(x) [/math] that is a product of [math] N [/math] functions. The derivative is then what?
7 posts and 2 images submitted.
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[math] f=f_1 f_2 f_3 \dotsm f_N [/math]
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This is OP, I think ive already figured it out.

[math] f'= \sum_{k}^{N} \left ( \frac{f_k'}{f_k} \prod_{i}^{N}f_i \right ) [/math]
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>>8963789
You can derive that yourself with the product rule big boi

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Maybe we're screwed...

A newly discovered branch of the Taurid meteoroid stream contains hazardous asteroids: https://www.aanda.org/2017-press-releases/1387
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>>8963762
let's hope they strike saudi arabia
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Well... Maybe not.

What does it converge to?

[math] \displaystyle{\sum_{n=1}^{\infty} \frac{1}{n^3 \cdot sin^2(n)}} [/math]
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http://www.wolframalpha.com/input/?i=sum+n%5E-3+sin%5E-2+(n)+from+n%3D1+to+infinity

4.80672...
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>>8963689

but...
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>>8963693
i'll trust wolfram over brainlets on stackexchange

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why in the fuck NASA would be hiding all this stuff?
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>>8963654
They just didn't take a picture there, because the telescope taking pictures broke down, the moon was in the way, or they ran out of money.
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>>8963665
>Telescope broke down

Right. Whatever you're smoking, I want some
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because actual stars look like this

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Hey /sci/, brainlet here.
I am trying to learn math on my own. I was solving a problem while I encountered this equation:

20+10x=2^x

I checked the solution to the problem and it said to just graph both sides and visually "get" the solution.

Now, this approach kind of annoys me as I feel that relying on graphs might be wrong for some reason. I tried to compute it with a logarithim but I just cannot solve it as x appears both outside and inside the logarithm.

Thank you
4 posts and 1 images submitted.
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there's no nicer way to do it
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>>8963560
Thank you very much, I did not expect it to be that way.
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-b/2a

How do mathematicians figure stuff like divisibility.
Like, if you want to see if 15,983 is divisible by 11, you add the alternate digits if they're equal then it's divisible by 10.

But HOW did they found that, did they brute force different ways to find divisibility or did they had some special method?

It seems like many things in mathematics can only be found by luck or loads of time of trial and error.

TELL ME
8 posts and 1 images submitted.
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>>8963544
11*
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First it starts with an observation
>Hey look the first few multiples of 1 have the sum of this property

Then you think of some way to prove it.

In your case it's not even hard, it's just a simple proof by induction.
If a number has the same sum of the digits in the odd and even place, then adding 11 to it also does. Since that's true for 0, it has to be true for any 11*k with k natural.

Viceversa, the same property is preserved by subtracting 11, so for any number k' that has the property you can subtract it till you reach a number lesser than 11, which has to be 0 because it is the only one with that property (otherwise adding 11 back the same amount of time can't bring you back to the starting number for the first property). Therefore k' is a multiple of 11.

I do agree that harder examples seem kinda random but when you study the matter more you start to see more order. Of course we can't do everything as human beings, some theorems are indeed proved by brute force.
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>>8963544

Bullshit. 11*9173 = 100903. The alternate digits don't add up.

Checkmate atheists.

I've been following this for years and the evidence keeps piling up. MUST WATCH PEOPLE!!
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>>8963523
https://youtu.be/yVUSktmehfc
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Bump. Is this real?
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>2017
>still believing in Nibiru

I've been waiting for years the supposed collision with that planet.
This is just shitty propaganda used by new age sects.

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Is what he said true?
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Yep,he even invented a new element as a replacement for palladium
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>more content lifted directly from /tv/
STOP
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Honestly I hate topics like this as different universes should remain as they are...however given the circumstances what makes Batman less capable is that he has too much of a moral code. When competing with powers beyond human emotion it's better to go with logic instead...considering the joker isn't dead in the DC universe is proof that Batman limits himself...ive read both sides and this is what I see.
>ready for lashback but nothing will change my mind

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As unsophisticated as they might be, I like optimization problems. There's something just so simple, elegant and practical about them. As long as you have the function to describe something, you can find its maximum value as easy as 1,2,3.

Beautiful, IMO

What is your favorite type of math problem? Why?
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>>8963418
sounds like you're only working on babby's first optimization problems, there's plenty that aren't easy like

https://en.wikipedia.org/wiki/Moving_sofa_problem
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>>8963418
>not using [math]\partial_t x[/math]
>>
classification problems are the best because autism

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