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Author Topic: Mathematics Help Thread  (Read 228914 times)

Christes

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Re: Mathematics Help Thread
« Reply #300 on: November 30, 2010, 02:42:26 pm »

Well, for most students, it's nice to not think about problems either ;)

The issue is that they'll need to think about other problems later in the assignment, and not be able to/want to since they are in the plug and chug rhythm.

I can't stop my students from running to the quadratic formula for the most easily factored quadratics, so I give other polynomials that reduce to quadratics or word problems that come down to solving one.  That way there is at least some thought involved.

For example, x^5 - x^3 - 2x = 0 is really easy to solve if you think about it the right way, but there is no quintic formula where you can plug the coefficients in.
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RedWarrior0

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Re: Mathematics Help Thread
« Reply #301 on: November 30, 2010, 03:51:57 pm »

My personal belief is that schools should make people figure out the quadratic formula on their own. Much more interesting that way.
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Vector

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Re: Mathematics Help Thread
« Reply #302 on: November 30, 2010, 03:58:08 pm »

What, why? It's nice to have a "be all end all" equation, even if it isn't quite there.

Because if you can solve a problem by looking at it, it's much better than solving it by tossing its coefficients in a formula and reducing square roots?
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"The question of the usefulness of poetry arises only in periods of its decline, while in periods of its flowering, no one doubts its total uselessness." - Boris Pasternak

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Earthquake Damage

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Re: Mathematics Help Thread
« Reply #303 on: November 30, 2010, 04:07:59 pm »

My personal belief is that schools should make people figure out the quadratic formula on their own. Much more interesting that way.

Why stop there?  Just tell them what textbook(s) to study and when the final exam is.
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Vector

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Re: Mathematics Help Thread
« Reply #304 on: November 30, 2010, 04:25:03 pm »

Why stop there?  Just tell them what textbook(s) to study and when the final exam is.

I don't know if you're being facetious or not, but as some folks have told me, the true purpose of a math teacher is to motivate rather than explain.

I'll just leave this here.
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"The question of the usefulness of poetry arises only in periods of its decline, while in periods of its flowering, no one doubts its total uselessness." - Boris Pasternak

nonbinary/genderfluid/genderqueer renegade mathematician and mafia subforum limpet. please avoid quoting me.

pronouns: prefer neutral ones, others are fine. height: 5'3".

Zrk2

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Re: Mathematics Help Thread
« Reply #305 on: November 30, 2010, 05:10:27 pm »

Damn, I forget how to reduce that problem. Please remind me how.
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RedWarrior0

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Re: Mathematics Help Thread
« Reply #306 on: November 30, 2010, 05:23:17 pm »

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Virex

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Re: Mathematics Help Thread
« Reply #307 on: November 30, 2010, 05:25:16 pm »

Okay, those last few posts? Has no one here ever heard of the quadratic equation?

Um... yeah, the quadratic equation is needlessly messy in almost all situations one encounters in high school/lower mathematics.
It's the other way around actually, high school math is made to be doable without factoring. They won't do fancy things like x2 + 13x + 5 (try that one by factoring for "fun") yet unless they want you to use the quadratic formula.
« Last Edit: November 30, 2010, 05:32:38 pm by Virex »
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Vector

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Re: Mathematics Help Thread
« Reply #308 on: November 30, 2010, 06:14:39 pm »

Damn, I forget how to reduce that problem. Please remind me how.

x^5 - x^3 - 2x = 0
x(x^4 - x^2 -2) = 0
x(x^2 - 2)(x^2 + 1) = 0


Um... yeah, the quadratic equation is needlessly messy in almost all situations one encounters in high school/lower mathematics.
It's the other way around actually, high school math is made to be doable without factoring. They won't do fancy things like x2 + 13x + 5 (try that one by factoring for "fun") yet unless they want you to use the quadratic formula.

I'm not entirely sure if you're agreeing with me or disagreeing with me, but in either case we seem to be on exactly the same page.
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"The question of the usefulness of poetry arises only in periods of its decline, while in periods of its flowering, no one doubts its total uselessness." - Boris Pasternak

nonbinary/genderfluid/genderqueer renegade mathematician and mafia subforum limpet. please avoid quoting me.

pronouns: prefer neutral ones, others are fine. height: 5'3".

Virex

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Re: Mathematics Help Thread
« Reply #309 on: November 30, 2010, 06:55:02 pm »

I thought you were implying that the math one learns in high school is inherently so simple that you'll rarely need the quadratic function.
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Vector

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Re: Mathematics Help Thread
« Reply #310 on: November 30, 2010, 07:00:01 pm »

I thought you were implying that the math one learns in high school is inherently so simple that you'll rarely need the quadratic function.

Oh, no.  I'm saying that the polynomials one is told to factor can usually be factored much more quickly by other means, for obvious reasons.  The math itself is simple; in many cases, it is only simple because it has been made so.
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"The question of the usefulness of poetry arises only in periods of its decline, while in periods of its flowering, no one doubts its total uselessness." - Boris Pasternak

nonbinary/genderfluid/genderqueer renegade mathematician and mafia subforum limpet. please avoid quoting me.

pronouns: prefer neutral ones, others are fine. height: 5'3".

lordnincompoop

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Re: Mathematics Help Thread
« Reply #311 on: December 01, 2010, 10:42:10 am »

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MaximumZero

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Re: Mathematics Help Thread
« Reply #312 on: December 01, 2010, 10:55:49 am »

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Holy crap, why did I not start watching One Punch Man earlier? This is the best thing.
probably figured an autobiography wouldn't be interesting

lordnincompoop

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Re: Mathematics Help Thread
« Reply #313 on: December 01, 2010, 10:58:02 am »

I actually remember having a teacher like that once, the same year we had a teacher that was the exact opposite of what the essay wants (he blathered on about the beauty of maths anyways). He came as a substitute for a term after the original one was on leave, and I remember that being the best term ever. He got me to enjoy maths for once.

He's gone now, sadly. I must find him sometime.
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Vector

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Re: Mathematics Help Thread
« Reply #314 on: December 01, 2010, 01:23:43 pm »

You're welcome =)

I've only found a couple of college professors that fully follow the spirit of the article, but I love them to death.  Of course, they're generally kind of crazy, but . . . super-adorable X3
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"The question of the usefulness of poetry arises only in periods of its decline, while in periods of its flowering, no one doubts its total uselessness." - Boris Pasternak

nonbinary/genderfluid/genderqueer renegade mathematician and mafia subforum limpet. please avoid quoting me.

pronouns: prefer neutral ones, others are fine. height: 5'3".
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