Ask a Math Student Stuck in a 2 hour Calculus 1 Lecture ANYTHING!

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  Jul 21, 2008 10:40 PM GMT

  Yup that's right
  I'm here... doing stuff I already know... (while eating cold oatmeal lol)
  So keep me awake!
  Ask me ANYTHING
  I'll answer it (if I can). DONT BE SHY
  
  (Emphasis on the ask me ANYTHING... you know... stuff that isn't exactly math related as well hahaha...
  
  However I must say... I thought I was the only math dork in the world... now if i could only find a Math dork that likes to go the gym, is my height, attractive, and lives in NYC... sigh)

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  Jul 21, 2008 10:43 PM GMT

  Okay, I'll start ...but they're quite lengthy! Here goes...
  
  ----- How do fashion trends work?
  ----- Who decides what the trend is for each each season?
  ----- What factors determines the fabric, color, texture, silhouette, etc. presented?
  ----- Where does one go to find the trends for each season?
  ----- When does a fashion trend go out of style?
  ----- Why do girls get to wear any color they want but guys barely get experiment in that area (How many royal purple suits do you see men wearing? How many peach colored slack do you see on men's clothing racks?)
  ----- How does a person become fashion forward? How does a person avoid falling behind?
  
  - For a young gay man 18-25, what would you suggest as basic requirements for their wardrobe?
  - Who is your favorite designer?
  - Where is your favorite place to shop for clothes?
  
  

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  Jul 21, 2008 10:50 PM GMT

  ZiMpLuS saidOkay, I'll start ...but they're quite lengthy!

  
  
  har har har lol
  
  Good thing I put that "I'll answer it (if I can)." Clause in my original post

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  Jul 21, 2008 11:34 PM GMT

  Is your teacher cute?

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  Jul 21, 2008 11:43 PM GMT

  Sedative saidIs your teacher cute?

  
  
  No, not to me lol.
  
  He's severely smart, but I guess I focus so much becuase he doesn't look attractive lol.
  
  Someone has to like him though . . .

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  Jul 21, 2008 11:53 PM GMT

  Are the integrals of all transcendental functions obtainable by polynomial differentiation of Taylor expansions?

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  Jul 21, 2008 11:56 PM GMT

  can't answer? perhaps you shoulda been paying attention. snap.

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  Jul 22, 2008 4:31 AM GMT

  carthesis saidAre the integrals of all transcendental functions obtainable by polynomial differentiation of Taylor expansions?

  
  
  Can't tell you - I'm in Calculus 1 remember lol
  
  The subject of Taylor Expansions is in Calculus 2 and 3
  
  But to take a wild guess, I believe the answer is yes lol - but not sure....

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  Jul 22, 2008 4:53 AM GMT

  omg lol i love calculus!

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  Jul 22, 2008 5:15 AM GMT

  What's 1 + 2?

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  Jul 22, 2008 5:18 AM GMT

  yes. Yes? yes.
  
  all transcendental functions can be written as Taylor expansions
  
  all Taylor polynomials can be integrated
  
  Then
  all transcendental functions can be cast as differentiations of tayor polynomials.
  
  all transcendental functions can be integated
  
  Then
  integral transcendental function = integral of differentiation of a specific tayor polynomial
  
  Here's a pretty one that's a less abstract, but more tricky:
  
  integral from 0 to infinity of e^(-(x^2)/2) dx
  
  I had it on a take home test in a slightly different form when I took Calc 2 with an insane teacher, but this one happens to be solved on Drexel's Mathforum, so you can look it up if you can't get it.
  
  
  
  SPOILING EVIL HINTS BELOW
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  Try it first!
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  If
  I = integral (0 to inf) e^(-(x^2)/2) dx
  then
  I^2 = integral (0 to inf)(e^(-(x^2)/2) dx) *
  integral (0 to inf)(e^(-(x^2)/2) dx)
  and
  I^2 = integral (0 to inf)(e^(-(x^2)/2) dx) *
  integral (0 to inf)(e^(-(y^2)/2) dy)
  (you can do this because variables are nothing more than placeholders: won't affect the numerical value at the end)
  I^2 = double integral (0 to inf)e^(-(x^2+y^2)/2) dx dy
  What does x^2+y^2 look like?
  
  
  
  MORE SPOILING HINTS BELOW
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  transform to polar coordinates, x^2+y^2 = r^2
  dx dy becomes r * dr d(theta)
  don't forget to change the limits of integration
  
  The whole solution altogether.
  
  Sorry for the long ass post.
  
  

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  Jul 22, 2008 5:19 AM GMT

  Aww shoot, you're in Calc 1. Well, you won't get to the stuff in my post until Calc 2. Sorry blind2limits

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  Jul 22, 2008 5:20 AM GMT

  Buckwheet saidWhat's 1 + 2?

  
  Fish
  
  
  
  No really it's just 3

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  Jul 22, 2008 5:23 AM GMT

  duckyflotsam saidAww shoot, you're in Calc 1. Well, you won't get to the stuff in my post until Calc 2. Sorry blind2limits

  
  
  It's okay.. just take out all the spaces in your rather lengthy proof post

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  Jul 22, 2008 5:33 AM GMT

  Uh, I kind of did it for a reason: so readers could run into the hints one at a time. But if enough people (like, 2) mention its incredible annoying-ness , I'll do that.

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  Jul 22, 2008 6:25 PM GMT

  blind2limits said

  Buckwheet saidWhat's 1 + 2?

  
  Fish
  
  
  
  No really it's just 3

  
  
  I like the fish answer. You're gonna make one helluva janitor! j/k

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  Jul 22, 2008 6:59 PM GMT

  I know some math majors will hate me for this, but have you read David Foster Wallace's history of infinity titled Everything and More? I recommend it. Most critics just can't stand his writing style. I admit his style is an acquired taste, but for those of us who *do* like this author the book is very rewarding.

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  Jul 22, 2008 7:14 PM GMT

  Are we going to lose another forum to idiotic...
  
  
  Ask a guy that ________ anything threads
  
  
  Aka is this going to turn into the now infamous Miscellaneous section of the bb.com forum.....

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  Jul 22, 2008 7:35 PM GMT

  blind2limits said

  Buckwheet saidWhat's 1 + 2?

  
  Fish
  
  No really it's just 3

  
  
  Not in base2 or base3.

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  Jul 23, 2008 7:09 PM GMT

  PDSurfer said

  blind2limits said

  Buckwheet saidWhat's 1 + 2?

  
  Fish
  
  No really it's just 3

  
  
  Not in base2 or base3.

  
  
  Not in base 8 or base 16 either, but you dont see me complaining lol
  
  Someone had to do it lol
  

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