/sci/ - Science & Math

Nah youre fucked

>>10200465
You won't be able to learn how to do even a single proof even if you spent all 23.5 hours on it

>practicing row operations at all, much less for 20 hours
Why the fuck would you do that

Stop making these threads, you’re going to fail.

>>10200465
>The exam is supposed to be rigorous and proof-based.
>From what I can tell, linear algebra is just y=mx+b applied to the substitution method, but in an archaic notation.
you're fucked lad

>>10200471
>Nah youre fucked
not an argument
Is /sci/ really this stupid?

>>10200524
This is not something that needs an argument, you're objectively fucked. What did you even expect?

>>10200529
I dunno, this stuff seems pretty easy so far. What gives?

>>10200465

Is the same person making these linear algebra threads or does /sci/ not know anything about linear algebra?

>>10200541
You've only gotten to the parts that are so basic that they're essentially a repeat of middle school algebra class, and that already took you an hour. Proofs in linear algebra are actually quite tough and unintuitive until you do a decent amount of practice, much harder than geometry. You're fucked, just drop the class.

>>10200465
say bbye to your grade
just give up and retake it next semester

>>10200465
The best advice I can give you is learn that the IMT theorem applies as long as you can prove a system of equations is linearly independent which means there is a pivot in every row which you can prove by doing RREFs on every matrix. This will legitimately help you with dealing with those questions that ask if the invertible matrix theorem applies to whatever. Next piece of advice is that the crux of Linear Algebra is doing a RREF on a matrix and understanding what that means for a given problem outside of the vector space and null space bullshit. You should also spend at least sometime understanding the basics of null space and vector space stuff I still personally do not understand why they add that shit into Linear Algebra as it has not much to do with it and should be covered in abstract algebra anyway. Beyond that learn about rank, col and shit like that which is not hard as its just manipulating what a matrix looks like and as long as you can RREF matrices well enough this stuff should be a breeze as long as you remember what they look like and how to switch them up from the matrix to that form.

TL;DR the crux of Linear Algebra outside of vector space and null space concerns itself with what it means to be Linearly independent and dependent for a given problem

If there are people who can pass linear algebra over a summer course you can pass this, good luck anon; honestly Linear Algebra is easier than Calc 3, vector analysis and diff eq desu.

>>10200465
>linear algebra is just y=mx+b

if this is not bait you're thoroughly fucked.

>>10200465
so /sci/ understands that these are mostly bait threads right? right?

>>10200910
what did he mean by this?

>>10200465
OP you blithering idiot

ayyyyyy lmao op you're gonna fail hard as fuck
stop postponing and procrastinating next time fucker

>>10200465

No you can't

Bump.

With this little time remaining, you should probably go take a look at your institution's past papers and see what the exam format is like and what sorts of questions are going to be asked. No point practicing something for 20hours without knowing how much of it is even going to be examinable.

From your words, it appears that the exam that you'll be taking is probably going to be on basic linear algebras anyway so its probably not going to be too hard. Just keep in mind that vector space is something that follows certain set of rules or axioms, and you can verify this with vector spaces that you are already familiar with like the Cartesian coordinate system, or matrices.

>>10200465
You were here 2 days ago asking how to learn lin. alg. in 3 days...

>>10200465
>how to learn linalg in a week
>how to learn linalg in 3 days
>how to learn linalg in 1 day

Someone really doesn’t like linear algebra huh? I’m guessing you’re gonna have trouble on orthogonal spaces, eigendecomposition, linear independence, and other basics that require practicing the fundamentals

>>10200465
>Can I master linear algebra in 23.5 hours?
Why don't you try it and find out?

>>10200465 (OP)
>Can I master linear algebra in 23.5 hours?
If you're not stupid you can

>>10201762
>>10201869
this is too fucking funny
OP has so little control over his procrastination, he's gonna be back to ask if he can do it in 1 hour soon

>>10202457
>OP posts from his phone sitting in exam hall
>Can I master linear algebra in 3 minutes?

>>10200465
I can relate to the procrastination anon. Linear wasnt fun for me but abstract was. Luckily the professor was nice for linear and allowed us to use our notes even though it was rigorous

>>10202457
OP here. Unironically, can that be done? I just found out I have to take my extended family to dinner in a few hours, and my exam starts immediately after I get back.
I got in some good studying these past ~20 hours. I think I kinda understand the definition of a vector space, vector combinations and all that, and I'm going through a few exams from previous years. What the fuck is a nilpotent operator? Can someone please eli5 the Cayley-Hamilton Theorem?

>>10202862
The Cayley–Hamilton theorem is basically just saying that for the characteristic polynomial p(x) = det(xI - A), then p(A) is equal to the 0 matrix.

>>10202884
bump

Working with vectorials and shit is something you can master within 23 hours, but not the mechanics and proofs behind it lad.

Every year thousands and thousands of students who were dominating when it comes to math in high school , having As and max. 3 Bs, start studying math. They get new calculators and shit and get btfo'd when they have to learn Lemmas, Rules and all that autistic Cauchy- Shit.

There is no formula when it comes to theorethical math like "2-x=0, so 0 must be 2". You have to learn new ways of thinking and abstract patterns. Most people never owned it due to the shittier school system.

Lad, you're fucked. Redo the course in a year o so

t. Former math student who has autistic stories to share.

>>10203098
>so 0 must be 2
>0 must be 2

>>10203182
>t. retard who can't think abstractly
>>10200465
OP I care about you, and I want you to succeed. Your time is up by this point, but I hope you follow up on this thread to tell us how it went.

>>10202862
u got dis bud

>>10203182
Sry. Meant x lmao

>>10203290
lmfao top meme

>>10200465
depends on if you get what your professor taught, good luck buddy - sounds like you might need it ! MWHAHAHAHAHAHAHA

>>10200465
Those who tell you you will fail are misguided, the mind is infinite. Use that energy to see the solution. A positive outlook (although this may seem like a banal platitude) is the building block of every mathematician. How could a true artist be depressed?

>>10202460
kek

>>10203098
this is me. i did fine in 'procedural' math where you just follow the instructions. now 2 years into my undergrad, analysis is assfucking me

OP here.
Just aced that shit, motherfuckers. Gonna get some rest, but I'll explain the details sometime tomorrow.

>>10200465
What's up with /sci/ and it's inability to do basic maths like calculus 1,2?

>>10200465
2 hours should be enough
but since you have no prior relevant knowledge it might take 5 hours

Ah this thread again. Made by multiple different people because it became a meme.

>>10204189
fake. You completely failed the exam, didn't you.

>>10204189
based

>>10204189
What were the questions like?

>>10204668
about 15 rigorous proofs, 8 pages total, 3 hours

>>10200465
watch 3blue1brown youtube channel, he has an entire series on the subject explaining quite eloquently

>>10205330
watched the entire series and found it pretty useless

>>10205521
Maybe for an exam, but it's good for intuition.

>>10200465
>COLUMNS BY ROWS

>Implying Linear Algebra cant be learned in 4 hours

http://cs229.stanford.edu/section/cs229-linalg.pdf

>>10204189
OP BTFOs all /sci/ brainlet 'masterminds' I see, might as well call the mods to delete this board now

>>10200465
I tried the same thing. It doesn’t work and you need practice to do proofs and understand what you actually are doing. It is not y=my+b rofl.
I took it second time, got an A, and realized how fucking awesome it was. This was applied linear algebra (for some reason "applied" counterintuitivly is a class based on proofs not real life applications like traffic)

>>10204189
never doubted you

>>10205547
>muh visual aids
it stunts your intuition in the long run

Everyone else, please remember that your brain needs time to reconfigure itself physically when you learn, and that sleep deprivation is roughly equal to being drunk when it comes to test taking.

>>10203426
True artists are most prone to depression for a true artist suffers every waking hour in a science and technology world which will never have the expressions of the imagined worlds in an artist's fantasy.

>>10205752
God bless you Anon, I have a linear algebra exam tomorrow and I still need to learn alot.

Imagine believing learning lines is difficult.

>>10205821
good thing i go to each test drunk to even it out

>>10204189
Yeah, no.
>>10204312
This.

>>10200465
analyze the book
determine most likely questions
understand all the patterns

I've done this with Vector calc. IF test higher than total grade then finals became your grade for class. I didn't do anything all semester till a few days before final. Just read the book, analyzed the patterns for all related questions, and aced it.

>>10206176
The key for doing this is looking at the book in a meta way. You shouldn't try to understand it intuitively. Rather reduce the book into the patterns of potential questions and how to solve them functionally.

It's very easy once you do this. The total code required to solve every say vector calc problem is very small. If you understand the code and can apply it you can easily ace it. Especially if they allow notes.

Just have to be decently intelligent and know where to put the variables.

>>10206180
>Notes
Fucking lol. If an exam alows notes there is not one reason to not be able to ace the exam.

>>10200465
>tfw i know this guy IRL

>>10207132

No lol, even if I could take the book with me to my math exams, I still wouldn't get an A.

Remembering all the theorems is easy, solving the problems that come up every year is easy, if that stuff is enough to get you an A then the test is trash.

>>10207132
if an exam doesnt allow notes, then just sneak index cards in anyway

>>10207196
What would the questions be like so that you wouldn't be able to solve them if you had notes?

Unless you meant going in to take the exam with no practice at all on the material covered by the test. In that case yeah I would agree that you would be fucked.

>>10207220
I don't know where you go to school but that wouldn't work where I am. Also if your caught you can kiss your degree byebye just because you couldn't be assed to memorize some shit that can fit on an index card (not a lot of material to memorize)

>>10207229

No I mean knowing all the material but failing to get an A because the question doesn't resemble any typical problems and it's not clear what you should do. Even if you have the book it won't help you because there's no similar problems you can look at.

On my exams typically 0 to1% of people get A and 1-5% get B.

>>10202460
>alright so I failed the class, how can I learn this during the winter so I ace it next semester
>Ok so I have one week to learn everything in two days can I learn linear algebra in 4 hours? I have 10 minutes btw and I know Ax=b.

>>10207220
>>10207239
My linear algebra class did not check Ti-84 memory. Thus, you could pack the thing full of whatever you want.

>>10200465
this meme is getting out of control

>>10207132
not if it's some liberal arts gen ed class

>>10200465
Take the book and open your eyes really wide. Then just look at each page that is connected to the exam. Once you have done tjis for like a thousand times you will have memorized the book. Now you can cheat by simply reading the book in your head while taking the exam. And you might have 6 to spare/sleep

>>10200465
Yes you can