Homework Help

[SCS 7,522]

Just want to put this here for anyone who may see it. 

If anyone needs help with math, please feel free to PM me. I can help with most everything up through multivariable calculus and elementary differential equations. I may be able to help to a minimal extent with linear algebra or other (basic) levels of higher math beyond calc 3, but I would need to consult other references to do so.

Additionally, I would be interested in receiving help from anyone with substantial experience with modern algebra, real and/or complex analysis, number theory and topology ranging from the elementary to intermediate level. (In other words, anything beyond a 1st or maybe 2nd course in one of those subjects would be way too far beyond my ability at this point in time.)

[Jeric 46,850]

@SCS I don't know why but I swear seeing you mention topology hit be with a heavy feeling of deja vu. 

And to anyone that sees this, I'll vouch for his skill set. I actually bemoaned not having access to him when I was trying to explain some harder Trig concepts to my youngest kid. 

[111111 111]

Im studying to become a teacher in social studies (sociology, politics, national economics etc. ) and I would love to test my teaching skills, if I help a friendn or 2 on the way the thats just awesome! 

Plees feel free to pm me whenever, I reply as fast as I can.

Dislcaimer:Social studies varies from one country to another, just be aware of that and please dont ask me about grammar, Im really bad at that. 

Edited October 15, 2017 by Purple sky

[SasQ 1,375]

On 15.10.2017 at 2:30 AM, SCS said:

If anyone needs help with math, please feel free to PM me. I can help with most everything up through multivariable calculus

How about change of variables and transforming differential equations to different coordinate systems?

On 15.10.2017 at 2:30 AM, SCS said:

and elementary differential equations

Do second (and higher) order ODEs with non-constant coefficients count? I can handle with first-order non-constant-coefficients equations, but higher-order ODEs with non-constant coefficients that are not Cauchy-Euler (aka equidimensional) equations are still causing a lot of trouble to me. Even as innocently-looking as this:  y" = x²·y
(inb4: Yes, I know that they can be solved by power series methods, but this is very cumbersome and the results are quite useless – it's like obtaining the formula for all the digits of √2 but not knowing that it is actually a √2. So I'm rather looking for some more exact, algebraic methods.)

Oh, and one more thing: TENSORS. If anyone here knows what they are and how they work, I would be glad to hear it.

Edited October 17, 2017 by SasQ

[SCS 7,522]

On 10/14/2017 at 6:19 PM, Jeric said:

@SCS I don't know why but I swear seeing you mention topology hit be with a heavy feeling of deja vu. 

And to anyone that sees this, I'll vouch for his skill set. I actually bemoaned not having access to him when I was trying to explain some harder Trig concepts to my youngest kid. 

Thank you so much, Jeric, I really appreciate your kind words.  

I think I may have mentioned topology in our discussions in the past -- that branch of mathematics has long held a particular intrigue for me. 

That's very kind of you, thank you. If I can ever be of help with trigonometry or anything else, please always feel free to send me a message about it and I will gladly do all I can to help.

 

On 10/17/2017 at 9:51 AM, SasQ said:

How about change of variables and transforming differential equations to different coordinate systems?

Do second (and higher) order ODEs with non-constant coefficients count? I can handle with first-order non-constant-coefficients equations, but higher-order ODEs with non-constant coefficients that are not Cauchy-Euler (aka equidimensional) equations are still causing a lot of trouble to me. Even as innocently-looking as this:  y" = x²·y
(inb4: Yes, I know that they can be solved by power series methods, but this is very cumbersome and the results are quite useless – it's like obtaining the formula for all the digits of √2 but not knowing that it is actually a √2. So I'm rather looking for some more exact, algebraic methods.)

Oh, and one more thing: TENSORS. If anyone here knows what they are and how they work, I would be glad to hear it.

Regarding the differential equations topics you mentioned, I have had a decent amount of exposure to them but those are among the most challenging concepts for me personally in the study of elementary differential equations. Admittedly, while I have out of interest looked at 3rd order and higher ordinary differential equations, I have little to no experience attempting to solve them. I do have some experience with change of variables, power series methods and ODEs with non-constant coefficients, but these were topics I learned toward the tail end of the class I took and among some of the most challenging. Please feel free to PM me any time if you would like assistance with any problems or these topics in general, and I will gladly do so -- I may just need to review the subject further and do a couple practice problems just to make sure my understanding is sufficient.

In regard to tensors -- they are definitely an advanced topic. I don't know what level they are introduced in a physics or engineering class setting, but in regard to approaching them from a more purely mathematical angle they are typically omitted from first courses in modern algebra or related subjects, unless you're taking a very advanced first course. I would recommend studying linear algebra first, at minimum. Possibly some abstract algebra as well. I have read about tensors out of interest, but my mathematical maturity isn't at a point yet where I'm able to fully understand what I'm reading. The main thing I've gotten out of it so far is that they build on more fundamental notions of vectors and scalars and allow for deeper study and generalizations.

[Feather Spiral 1,892]

Molecular biology major here, so if you have any biology questions (particularly genetics), you can ask me. Although tbh I've only recently been visiting this place again, not sure I'll go back to the level of activity I had before my years-long break.

[SoberStarlight 906]

Currently working towards my English major, and I am a literature enthusiast, so any questions pertaining to Language Arts, I'll be happy to help!

[Midnight Blaze 98 1,138]

Does anypony have any tips on how to learn 2 tables of Greek noun endings in three days?

 

[Midnight Blaze 98 1,138]

Please give useful revision methods!

[Jeric 46,850]

16 minutes ago, Midnight Blaze 98 said:

Please give useful revision methods!

Not my country, but I am familiar with what other have told me works. You about five weeks out? Have you created a timetable and schedule? 

[Feather Spiral 1,892]

On 11/13/2017 at 6:13 PM, Midnight Blaze 98 said:

Please give useful revision methods!

Practice is what works best, I find.

Instead of trying to retain tables with dozens of suffixes, try learning an example for each. You could even make sentences, if possible with all of them. Or a sentence for each part of the table (say, a sentences with only definite singular articles, etc).

Better still, make a sentence with only those suffixes; when learning German in France, that's how the teacher taught us the Perfekt prefixes. This mnemonic sentence: "Cerbère gémit en enfer" literally means "Cerberus whines in hell" in French, but it also sounds like a chain of these prefixes: zer-, be-, er-, ge-, miss-, ent-, emp-, ver- (I cited all of them from memory, and believe me I have a shit one).

The more you group things together, the fewer objects there are to memorize.

Edited November 18, 2017 by Feather Spiral

[Midnight Blaze 98 1,138]

@Feather Spiral @Obi-Quiet Thanks- I learnt them all in time.

On ‎13‎/‎11‎/‎2017 at 5:31 PM, Obi-Quiet said:

You about five weeks out?

Nope- we just got given a very short time to learn them.  

[Thorgir the Mighty 736]

I know a bunch about science,but I am baffled by this!!!

[GeekySonic 1,150]

I don't expect this to do me any good, but I desperately need help understanding trigonometry. Specifically, applying the sine, cosine and tangent operations to right triangles. I have 3 math classes, 2 after-school tutors, and I've read several articles online, and my brain refuses to comprehend any of it. I have a test next Wednesday and if I don't absolutely ace it, then I don't graduate.

[Feather Spiral 1,892]

On 5/11/2018 at 5:55 PM, GeekySonic said:

I don't expect this to do me any good, but I desperately need help understanding trigonometry. Specifically, applying the sine, cosine and tangent operations to right triangles. I have 3 math classes, 2 after-school tutors, and I've read several articles online, and my brain refuses to comprehend any of it. I have a test next Wednesday and if I don't absolutely ace it, then I don't graduate.

Shorten these words to their initials: Sine, Cosine, Tangent, Adjacent side, Opposite side

Write down this "word": SOCATOA

Separate first part into pairs, leave the last three letters together: SO-CA-TOA

Add H for 'Hypotenuse' at the end of pairs: SOH-CAH-TOA

Expand into:

• SOH -> sin = Opposite/Hypotenuse
• CAH -> cos = Adjacent/Hypotenuse
• TOA -> tan = Opposite/Adjacent

If that don't work, then idk... but generally reducing things to single words/phrases/sentences can help, like our German teacher did by turning a list of German adverbs into a coherent French sentence. In any case, I wish you the best on your math exam, because if you're having as much trouble learning as it sounds, you'll need every bit of support and courage you can get.

Edited May 18, 2018 by Feather Spiral

[Brony Number 42 10,069]

On 5/11/2018 at 10:55 AM, GeekySonic said:

I don't expect this to do me any good, but I desperately need help understanding trigonometry. Specifically, applying the sine, cosine and tangent operations to right triangles. I have 3 math classes, 2 after-school tutors, and I've read several articles online, and my brain refuses to comprehend any of it. I have a test next Wednesday and if I don't absolutely ace it, then I don't graduate.

How did it go? I guess it's too late for help.

[GeekySonic 1,150]

14 minutes ago, Feather Spiral said:

Shorten these words to their initials: Sine, Cosine, Tangent, Adjacent side, Opposite side

Write down this "word": SOCATOA

Separate first part into pairs, leave the last three letters together: SO-CA-TOA

Add H for 'Hypotenuse' at the end of pairs: SOH-CAH-TOA

Expand into:

• SOH -> sin = Opposite/Hypotenuse
• CAH -> cos = Adjacent/Hypotenuse
• TOA -> tan = Opposite/Adjacent

If that don't work, then idk... but generally reducing things to single words/phrases/sentences can help, like our German teacher did by turning a list of German adverbs into a coherent French sentence. In any case, I wish you the best on your math exam, because if you're having as much trouble learning as it sounds, you'll need every bit of support and courage you can get.

 

7 minutes ago, BronyNumber42licious said:

How did it go? I guess it's too late for help.

Thank you kindly. I did get some additional help here, and I somehow passed the test. I'm ending the year with a high C, which is, given that I've surfed the year between D's and F's, a miracle.

[Brony Number 42 10,069]

10 minutes ago, GeekySonic said:

 

Thank you kindly. I did get some additional help here, and I somehow passed the test. I'm ending the year with a high C, which is, given that I've surfed the year between D's and F's, a miracle.

So you finished HS? Going to college? I recommend learning as much math as possible. Get some books.

[GeekySonic 1,150]

53 minutes ago, BronyNumber42licious said:

So you finished HS? Going to college? I recommend learning as much math as possible. Get some books.

For a number of reasons, I won't be going to college.

[gamecubeguy214 2,512]

I'm doing a science fair project about how the interior of the Earth transfers energy to the surface. I've got a pretty good report down, but my teacher wants the project to try to solve a problem regarding the topic. I asked her and she told me something, but I completely forgot the term she used that she calls a problem. Someone quote me if you have an idea for me.

[Feather Spiral 1,892]

@gamecubeguy214 Can't really help unless we have a clearer idea what the problem is.

First of all, can you describe the concept she talked about, even though you don't recall its name? If not, you should ask her to repeat it, maybe even write it down for you.

[Passion 3,484]

The only thing I can think of here based on the above relates to conduction and soil heat flux density. Maybe that's the term you're missing? Mantle/hydrogenic convection, perhaps?

[ZethaPonderer 2,199]

Ok this topic has been bugging me and I wanna experiment here in this topic if you don't mind. I'll just give it as a test drive.

Basically I have these 8 problems that relate to a high level Math/Finance course (Theory of Interest), Actuarial Science level Math here, and these problems relate to these respective chapters in my textbook: Measuring Interest, Solving Problems in Interest, Annuities, and Amortization. Let's start with the first question here.

1. At the same rate of non-zero interest, the present value of a level payment annuity-immediate of 6n payments of $R is 7/2 (or 3.5x) the present value of a 2n payment annuity-immediate with the same payment. What’s the present value of an annuity of 12n payments of $R in terms of the present value of the annuity of n payments?

For all you people struggling in lower level Math courses like Algebra and Geometry, they are nothing compared to Real Math (e.g. Linear Algebra, Abstract Algebra, Real Analysis, Probability and Statistics, and Theory of Interest) where every topic is so abstract and theoretical to the point of making your head spin. It would make you question if you really are a Math expert as you say you are. No wonder some Mathematicians suck at doing the kind of Math the common average person is familiar.

The Math I've been learning all my life is a lie (just like cake). I used to believe I was good at Math, but now... I'm not so sure anymore. 

[Feather Spiral 1,892]

@ZethaPondererWhy's the topic "bugging" you, and what "test" do you mean?
Am I right to assume you posted that question here just to see whether one of us will be smart?

This is a thread for those who're having difficulties doing homework, in need of some guidance.
Because it's easy to think you understand stuff you're told in class, if your teacher explains the reasoning clearly. But when it comes to trying to solve a problem, it can be tough to figure out which way the logic goes. Especially when you know many methods to seek an answer but aren't sure which one will be more accurate.

So, are you legitimately in need of guidance in answering that question you posted? The rest of your post sounds more like you're flexing about "Real Math" rather than asking for homework help.

And wth is this "Real Math" thing anyway, I've never heard it called that until now?
I could tell you about "Real Biology" because I've studied Population Genetics, learned about Illumina sequencing, done PCRs and phylogeny. I'm betting 3/4 of the memberbase here haven't heard of any of these notions until they saw my post. Does that mean they haven't been learning biology, that it was all fake?

I am genuinely confused by the wording of that post there... I understand it's much harder than middle-school maths, but why's this a "test drive"?

[ZethaPonderer 2,199]

@Feather Spiral Well it's both ways. Being skeptical while still being opportunistic enough to see if this topic is legit in the same manner as say Chegg or Wyzant, just to see if anyone can figure out a solution for it. Under what criteria does this topic specialize in tutoring people. From Pre-School Subjects to High-School Subjects? From Kindergarten to College level? Cause it's not clear.

Also, that was more of a vent rather than a flex since I feel dumb for not figuring out how to solve these 8 problems in my course to do well in. The reason why I emphasize the Math I'm learning is for "Real" is because this is hardly taught (since this is abstract and theoretical in nature) and I wish I would've learned this sooner. I feel cheated in my life for not knowing this.

I miss number crunching and having fun with Algebra.