[ 3 / biz / cgl / ck / diy / fa / ic / jp / lit / sci / vr / vt ] [ index / top / reports ] [ become a patron ] [ status ]
2023-11: Warosu is now out of extended maintenance.

/sci/ - Science & Math

View post   
File: 8 KB, 390x300, calculator.gif [View same] [iqdb] [saucenao] [google]
4213228 No.4213228 [Reply] [Original]

sup /sci/, i have a question, it probably sounds stupid xD
but think about it, why do you need maths when there are calculators? :o (pic related)

>> No.4213233 [DELETED] 

Calculator's are not precise. They round up numbers. For example they say 0.999... = 1 although everyone knows they are not equal.

>> No.4213238

Autism op, autism.

>> No.4213258
File: 39 KB, 498x614, 1324091861893.jpg [View same] [iqdb] [saucenao] [google]
4213258

>>4213233
>>4213238
>>4213228

>> No.4213268

bump

>> No.4213271 [DELETED] 
File: 11 KB, 251x226, laughingwhores.jpg [View same] [iqdb] [saucenao] [google]
4213271

>>4213258
>he believes 0.999... = 1

>> No.4213279

Get your calculator out and tell me how much current will flow through the drain of a MOSFET whose threshold voltage is 1.5V, whose gate is at 1.5V, whose drain/source is supplied with 25 volts while the d/s impedance line is 1kOhm.

Then i'll tell you why you can't just do math on a calculator.

>> No.4213281

>>4213271
I never said that.

>> No.4213286 [DELETED] 

>>4213279
>confusing physics with math

>> No.4213295

>>4213281
you aren't me faggot.

>>4213271
go look up a proof ya fucking cunt idiot

>> No.4213298

cuz calculators can't do math.

>> No.4213300

>>4213298
aww shit forgot so sage

>> No.4213304

Replace Calculator with Mathematica 8 and you are right

>> No.4213309 [DELETED] 

>>4213295
I have the proof, you retard.

0.9 =/= 1
0.99 =/= 1
.
.
.
0.999... =/= 1

Q E fucking D

>> No.4213311

>>4213300
>implying sage is of any use afterwards

lrn2sage

>> No.4213360

bump

>> No.4213392
File: 153 KB, 467x350, Fuck_Logic_Zen_Master-s467x350-161149-580.jpg [View same] [iqdb] [saucenao] [google]
4213392

>>4213360
reported.

>>4213228
reported

>>4213309
reported for inane troll

>>4213228
>it probably sounds stupid xD
xDDDD so DEEP & EdGy!!! :D LOLOL we can DO TeH abstract and lie algebras on CALCULDATOR!!eleven!!one!!!1! xD LOLOL POINT SET TOPOLOGY CAN BE TYPED INTO A FOUR FUNCTION CALCULATOR MATH IS 4 AUTISTS LOLLOLOLOL NERD SHITS YOULL NEVER USE A HIGH-DIMENSIONAL PSEUDO-RIEMANNIAN MANIFOLD AND TENSOR SPACES OUTSIDE OF AUTISM UNIVERSITY!!! ;))))))

>even though you live on one you fucking ignorant faggot

>> No.4213427

>>4213392
U MAD? xD

>> No.4213430

>>4213392
>saging with a pic

>> No.4213433 [DELETED] 

>>4213392
>reporting a legit proof

You know this board is for math, righ?

>> No.4213442

>>4213433
>reported

>> No.4213450

>>4213430
reported for not understanding yotsuba enjoy your ban

>>4213433
reported for illogical math enjoy your ban

>>4213442
reported enjoy your ban

>> No.4213462

>>4213450
reported for not telling me why you fucking reported me faggot enjoy you motherfucking ban you little bitch

>> No.4213465

Calclators do math for us. Without math to do, there is no calculator.
To address the question as it was more intended, its because you need to UNDERSTAND the concept before you can actually do the advanced maths on a calculator. Many scientific jobs and branches require complex calculus-based formulas, and usually calculators ARE used. But to understand such a formula, you still need to learn it.
Also, doing simple math in your head is easier than actually pulling out the calculator. Overaall, if you really ARENT interested in math as a career, i guess you really wouldnt need the math you wouldnt use.

>> No.4213481
File: 32 KB, 385x476, 1237984747392.jpg [View same] [iqdb] [saucenao] [google]
4213481

sup /sci/, i have a question, it probably sounds stupid xD
but think about it, why do you need language when you can point and grunt? :o (pic related)

>> No.4213489

>>4213481
mtp confirmed for OP

fuck you

>> No.4213491

>>4213481
GTFO

>> No.4213503

>>4213279
you didnt specify if its an EMOSFET or a Dmosfet
based from your given we can easily calculate the drain current of the emosfet by the eqn
<span class="math">I_{D} = k(V_{GS}-V_{GS(TH)})^2[/spoiler]
<span class="math">I_{D} = k(1.5-1.5)^2[/spoiler]
drain current is zero

>> No.4213507

Yes EVERY ONE HERE SHOULD GET BANNED, ENJOY UR BANS

>> No.4213510

>>4213286
thats not physics you fucking retard thats gay faggot engineer

>> No.4213511

>>4213507
lrn2tripcode

>> No.4213515

>>4213507
wtf happend

>> No.4213525

>>4213507
>>4213515
You are a true genius.

>> No.4213887 [DELETED] 

>>4213515
hey, you're not me

>> No.4213900

Good luck conceptualizing physics if you don't understand the math describing it.

>> No.4213910

>>4213309
Yeah, well,

1/9= .111...
9*(1/9)=9*.111...
1=.999...

There ya go.

>> No.4213911 [DELETED] 

>>4213910
>1/9= .111...

There's your mistake. 1/9 is 1/9 and not .111...

>> No.4213917

>>4213911
http://lmgtfy.com/?q=1%2F9

>> No.4213926 [DELETED] 

>>4213917
According to google it's 1 / 9 = 0.111111111
WITHOUT THE "..."

Explanation can be seen here: >>4213233
And that's why calculators can't into math.

>> No.4213935 [DELETED] 

1 - 0.9 = 0.1
1 - 0.99 = 0.01
...
1 - 0.999... = 0.000...0001

>> No.4213936

Toasting in a roll bread.

>> No.4213948

>>4213936
u jelly

>> No.4213961

>>4213926
Exactly, so 1/9 does equal 0.111..., but a calculator can't show it. So my proof is right.

>> No.4213969

>>4213961
No! Your proof is illogical garbage. 1/9 is neither 0.111111111 nor 0.111...
You cannot perform operations that aren't allowed.

>> No.4214000
File: 3 KB, 151x107, sshot_2012-01-03_17:11:31.png [View same] [iqdb] [saucenao] [google]
4214000

>>4213969
Fucking geometric series, how does it work

>> No.4214013
File: 22 KB, 400x400, retard.jpg [View same] [iqdb] [saucenao] [google]
4214013

>>4214000
You typed it in your computer and your computer made an approximation. Due to rounding you got the numbers to be equal while in reality they are not.

>> No.4214015
File: 3 KB, 150x88, sshot_2012-01-03_17:15:19.png [View same] [iqdb] [saucenao] [google]
4214015

>>4214013
That calculation was exact. Pic related, approximated version.

>> No.4214023

>>4214013
this:
http://www.wolframalpha.com/input/?i=1%2F9&lk=1&a=ClashPrefs_*Math-

and this:
http://www.wolframalpha.com/input/?i=sum+10^-n+from+1+to+infinity

No, this is for real. Look at the fucking summation, retard. Its:
.1 + .01 + .001 + .0001 . . . + 10^-n as n goes to infinity.

it equals 1/9th. There's no arguing this. 1/9 equals .1111111111 . . . (repeating). Do the long division.

>> No.4214024

>>4214015
Your approximated version is obviously wrong. Stop posting fallacious pictures, unless you want to prove me right.

>> No.4214029
File: 10 KB, 616x421, 0-999 equals one epsilon proof.gif [View same] [iqdb] [saucenao] [google]
4214029

>>4214024
keke

>> No.4214030

>>4214023
>hurrrrrrr

I can make up a lot more sequences converging to 1/9. That doesn't prove your nonsensical statement.

>> No.4214036
File: 28 KB, 500x500, 1307186428657.jpg [View same] [iqdb] [saucenao] [google]
4214036

>xD
>troll because second line makes no sense

/sci/, you need to learn about trolls

>> No.4214037

>>4214029
All you showed is that 0.999... and 1 have a distance smaller than epsilon. They still don't need to be equal (and in fact they aren't).

>> No.4214040
File: 8 KB, 162x292, longdivision.jpg [View same] [iqdb] [saucenao] [google]
4214040

>>4214030
Yes, but when you do, they will necessarilly always come out as .1111111 or 1/9.

I'll just leave this here.

>> No.4214045

>>4214040
Your poorly drawn scribble isn't a proof. Anyway you can't work with dots in multiple directions.

Just give it up. You can't prove a false statement, troll.

>> No.4214050

A calculator doesn't do maths, it calculates.

>> No.4214055

>>4214045
>can't work with dots in multiple directions

fucking loled, 7/10

>> No.4214061

>>4214030
Everyone of them also converges to 0.1111111111111...

>> No.4214065

>>4214061
No, it doesn't. A sequence cannot have two distinct limits.

>> No.4214076

>Computation
>Mathematics

Choose carefully next time

>> No.4214091

>>4214065
That makes no sense. If a series converges to both 0.11111... and 1/9, then obviously it has two distinct limits? The numbers don't lie after all.

>> No.4214100

>>4214091
>intentional logical fallacies
I know you're trolling, but I'm gonna correct you again. I can make a series that converges to 1/9 and I can make a series that converges to .111... But I can never create a series converging to both.

>> No.4214149

>http://en.wikipedia.org/wiki/0.999......

>http://en.wikipedia.org/wiki/0.999...#Algebraic_proofs
>http://en.wikipedia.org/wiki/0.999...#Analytic_proofs
>http://en.wikipedia.org/wiki/0.999...#Proofs_from_the_construction_of_the_real_numbers

It's a thing that is somewhat debated and isn't accepted by everyone, but yes there is plenty of proof for the equality 0,99999... = 1.

>>4213309

Jesus fucking Christ, what?
Are you god damn retarded? Don't you fucking know the difference between "0,9", "0,99" with finite "9's" and a "0,999..." that is repeating fucking infinitely?!

Go back to fucking High School you idiot. I'm not even a mathematician or very good with mathematics and even i know this shit.

Fuck i've just been trolled.

>> No.4214162

>>4214149
>2012
>falling for one of /sci/'s oldest troll topics