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Doing better in one area of math compared to another by Jarvis Norringfuck - Sat, 05 Mar 2016 21:27:39 EST ID:RHLOntyV No.15063 Ignore Report Reply Quick Reply
File: 1457231259567.jpg -(2159106B / 2.06MB, 4096x2535) Thumbnail displayed, click image for full size. 2159106
Anyone have something similar happen to them?
for example, I'm taking both a college algebra and trig class this semester, and while both are fairly challenging, I don't do as well on college algebra tests compared to trig tests.
The trig class moves faster and the tests are more in-depth, I study the same amount for both classes, but I consistently score higher in trig. I think it's because there's more room for "stupid mistakes" in algebra, as most of it is pure arithmetic.
Any thoughts on this?
Augustus Brazzleleck - Sun, 06 Mar 2016 03:18:38 EST ID:bxbjkBRo No.15064 Ignore Report Quick Reply
Consider this. This is probably the fourth algebra class you've taken, whereas the trig class you're taking is your first introduction to the subject.

Your algebra class is relatively more advanced and more in depth. What's more, there isn't uniform difficulty across math courses. Don't worry about it, just study harder in algebra.
Nicholas Brisslewater - Sun, 06 Mar 2016 12:39:55 EST ID:Dk8yywxc No.15065 Ignore Report Quick Reply

Algebra is infamous for being tough for even very intelligent people. You want to try to learn methods, ways of looking at problems rather than memorizing a solution. It's easy to check step by step a solution that's done for you, but sometimes you have to stare at a problem until it is intuitive why it's solved that way. This is true for all levels of math.

Learn math from scratch by Hugh Shittingdock - Wed, 24 Feb 2016 02:37:19 EST ID:NaTojNkl No.15058 Ignore Report Reply Quick Reply
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My first semester at the university was fun, every day I smoke wead. But that is not I was supposed do, so now I have to learn all the stuff, from limits to integrals and from matrices to geometry. Can you suggest some cool books for me, guys?
And excuse my English.
Lillian Clayfoot - Tue, 01 Mar 2016 12:21:48 EST ID:jM5wsKbL No.15062 Ignore Report Quick Reply
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I had a calculus for dummies that was great.

protip: leave a spare hour after your math classes to work on your assignments while the knowledge is fresh, then you dont have to worry about as much homework.

also, be keen and go ask your prof questions. its their job and your respnsibility to ask when your confused

Unsolved Zodiac ciphers by Angus Honeyfoot - Tue, 23 Feb 2016 23:40:50 EST ID:edLsgdZo No.15057 Ignore Report Reply Quick Reply
File: 1456288850535.png -(278484B / 271.96KB, 475x642) Thumbnail displayed, click image for full size. 278484
Has anyone taken a crack at this?
Esther Desslefure - Mon, 29 Feb 2016 12:42:19 EST ID:J4OUpAxW No.15061 Ignore Report Quick Reply
How do wewe even know thait's not meaningless gibberish, like thishttps://en.m.wikipedia.org/wiki/Voynich_manuscript

Big O by Esther Nazzlebig - Sun, 28 Feb 2016 18:08:48 EST ID:uLlpzKkX No.15059 Ignore Report Reply Quick Reply
File: 1456700928519.png -(675671B / 659.83KB, 1106x1012) Thumbnail displayed, click image for full size. 675671
This may be better suited for /prog/ but I'll try here.

15n + 62 = O(n)
15n + 62 <= c * f(n)

I need to find a C less than 40 and solve for k.
The answer is C = 16, K = 62, where 15n + 62 <= 16n, simplified to give you 62 <= n. This is what my textbook has as the answer.

Can anyone explain this to me? I don't understand, why is K = 62? I understand this is marking the point where one side of the equation passes the other side, but I don't know how 62 plays into that at all.
Esther Nazzlebig - Sun, 28 Feb 2016 18:14:55 EST ID:uLlpzKkX No.15060 Ignore Report Quick Reply
Hey nevermind, it's 62 because 15(62) + 62 <= 16(62). That was easy.

Diff Equations: Exact Equations by Sophie Goodstone - Tue, 23 Feb 2016 00:53:02 EST ID:qCDKBx4v No.15052 Ignore Report Reply Quick Reply
File: 1456206782611.jpg -(123714B / 120.81KB, 945x945) Thumbnail displayed, click image for full size. 123714
Please help.
Determine the constant c so that the differential equation is exact.
(x+cy+ 2)dx + (y-x)dy = 0
1 posts omitted. Click Reply to view.
Sophie Goodstone - Tue, 23 Feb 2016 11:52:28 EST ID:qCDKBx4v No.15054 Ignore Report Quick Reply
No. Wait.
c= -1 Correct?
Hedda Dirrydog - Tue, 23 Feb 2016 13:50:22 EST ID:A2j/BW/W No.15055 Ignore Report Quick Reply
That's correct, but your work >>15053 is all screwed up. You're supposed to be integrating, not taking partial derivatives.
Hedda Dirrydog - Tue, 23 Feb 2016 13:58:11 EST ID:A2j/BW/W No.15056 Ignore Report Quick Reply
You're supposed to find the potential function, which turns out to be F(x, y) = 1/2x^2 + 1/2y^2 + 2x - xy + z where z is the constant of integration.

for a er secret project by Polly Fanstock - Wed, 30 Dec 2015 04:20:23 EST ID:8sbm1RBU No.15010 Ignore Report Reply Quick Reply
File: 1451467223718.png -(15640B / 15.27KB, 819x460) Thumbnail displayed, click image for full size. 15640
got an answer??

it goes line by line not a whole sentence x
Nicholas Pockdock - Thu, 31 Dec 2015 07:58:38 EST ID:WhsPRodl No.15011 Ignore Report Quick Reply
Penny = million
Hundred penny = 100 million = pound
Hundred million pound = Hundred million pound
Angus Sorryforth - Thu, 31 Dec 2015 08:05:36 EST ID:8sbm1RBU No.15012 Ignore Report Quick Reply

isnt it to do with money so
hundred penny = £100million
£100million x £100million = hundred penny x hundred penny?
= £10000
Shit Snodbury - Sun, 21 Feb 2016 14:11:34 EST ID:WhsPRodl No.15051 Ignore Report Quick Reply
No because you see that a
penny = million
100 penny v 100 million = 1 pound
1 million = 0.01 pound
0.01 pound * 100 million/penny = 1 pound

f(x)= 0.01x

It has nothing to do with money, but with the prefixes and the specific numeral system (base 10 decimal)
I could might as well have been apples and pies

Where to start? by Betsy Sunderforth - Mon, 14 Dec 2015 02:29:48 EST ID:hlhZo5V6 No.15000 Ignore Report Reply Quick Reply
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Hey /math/,
I need some help. I have always been shit at math. I never studied throughout high school and got mostly C's or D's in math while maintaining straight A's in the rest of my classes. It was mostly due to me not completing homework, but I also failed to grasp a lot of concepts.

So now that I'm in college I'm fucking up hard in math. I have to take a class I already took in high school because I did so bad on the placement exams. And I just failed it. My goal is to get serious and focus on math more, however I have no idea where to start.

I'm in "Intro to College Algebra" which basically covers pre- algebra through algebra 2 with a little geometry sprinkled in. With that in mind, where the hell do I start? What material is out there that I should cover? Could you guys be so kind as to show me in the right direction as to where to study, whether it be Khan Academy or a particular set of text books. I feel as if I need to start towards the bottom of math knowledge because I honestly don't even remember the rules for working with fractions all the way back in elementary school.

Thanks guys.
6 posts omitted. Click Reply to view.
Shitting Fushbury - Wed, 03 Feb 2016 10:45:39 EST ID:OD6ADxvT No.15037 Ignore Report Quick Reply
Im somewhat impressed that you really do wish to turn your issues in mathematics around. Usually once someone has put Math off for so long they just dont have the will to get back to it.

Khan Academy is the best free resource and you should be on it every day for at least 20 minutes for extra practice. Do all the homework to the best of your ability and turn it in conpleted. On exams answer everything to the best of your ability and try and leave nothing blank. Partial points are better than nothing but this is more crucial in higher level classes.

Start at geometry and equation solving. If your unsure about algebra rules find examples before you practice something illegal for a week straight. Ive seen plenty of kids try and simplify the sum of two squares inside a square root :/

This was my study progressio before college after I spent 2 years washing dishes after high school.
Algebra1/geometry >> algebra2 >> pre calc 1/2 >> calculus
Differential >> integral >> vector >> series >> multivariable

Linear Algebra and Diff.Eq can be taken anytime after integral calculus.
Henry Fommlefield - Mon, 15 Feb 2016 19:36:38 EST ID:RHLOntyV No.15047 Ignore Report Quick Reply
not to be that guy, but I think you're thinking of Velleman's how to prove it, Polya wrote "How to Solve It," which is a great book in its own right.
Doris Nundlechodging - Wed, 17 Feb 2016 03:50:13 EST ID:aLV1scJv No.15048 Ignore Report Quick Reply
symbolab is free though

wolfram is just mathematica stripped down so you could just pirate that

Prolem Sets for Group Theory Class by Hamilton Crubbleshit - Sat, 07 Nov 2015 07:06:32 EST ID:q3ZVtHN5 No.14966 Ignore Report Reply Quick Reply
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So I'm taking a Group Theory class and we are using the book Undergraduate Algebra by Serge Lang.

It's a good book except that there's not solution manual so it is pretty useless to practice problems.

Can any of you please share any problem sets with solution, you had if you also took this class?

Or maybe a book on group theory that has both practice problems and solutions?

Pic unrelated.
3 posts omitted. Click Reply to view.
Archie Murdbury - Wed, 06 Jan 2016 02:44:58 EST ID:iXKR5G5E No.15014 Ignore Report Quick Reply
But the pic is related.
Edwin Cocklemane - Tue, 02 Feb 2016 20:35:30 EST ID:voE+OnYz No.15036 Ignore Report Quick Reply
>Pic unrelated.
Oh, you'll be surprised annon.
Albert Dublingkork - Sat, 06 Feb 2016 02:57:12 EST ID:peflw+mo No.15042 Ignore Report Quick Reply
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>Pic unrelated.

Linear ODEs by Faggy Harrypadging - Wed, 03 Feb 2016 22:38:05 EST ID:0k+KCTnX No.15038 Ignore Report Reply Quick Reply
File: 1454557085767.jpg -(57503B / 56.16KB, 592x127) Thumbnail displayed, click image for full size. 57503
I don't understand how this equation is linear. Can someone explain?
Lillian Sugglestock - Thu, 04 Feb 2016 02:04:38 EST ID:Zrg8t7vN No.15039 Ignore Report Quick Reply
Because sine is a function of t; if it were a function of y, then the equation would be non-linear.

Compass Math Practice by Phyllis Snodspear - Tue, 19 Jan 2016 11:58:07 EST ID:OMB8xTL7 No.15025 Ignore Report Reply Quick Reply
File: 1453222687845.jpg -(74281B / 72.54KB, 700x483) Thumbnail displayed, click image for full size. 74281
I'm going back to college after a 4 year hiatus, and I have to take the Compass test. I'm in desperate need of help on the math section since it's been about 8 years since i had to do high school math. I was wondering if any one here knows of any good sites, or maybe where to find workbooks relating to Algebra, Geometry, Precalc, and Trigonometry. I have ordered a test prep book, but I'm looking for somewhere/something to practice as much as I can.
Lydia Bammerhall - Sun, 24 Jan 2016 01:37:20 EST ID:AdhSDDTT No.15032 Ignore Report Quick Reply
The no bullshit guide http://minireference.com/

However if you want to truly understand wtf is going on then Serge Lang's Basic Mathematics is what you want http://libgen.io/book/index.php?md5=576728b662199bc472c74dcbe12d3e5c
Molly Murdham - Tue, 02 Feb 2016 12:02:01 EST ID:OMB8xTL7 No.15035 Ignore Report Quick Reply
Thank you much.

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