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Mathe questions

  1. Jul 8, 2005 #1
    Is infinity - 1 still infinity. Also if 1\3 = .333... then wouldent 3\3not only = 1 but .999... as well?
     
  2. jcsd
  3. Jul 8, 2005 #2

    Moonbear

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    I suggest you wander over to the math forum and take a look at the threads answering this question there. The thread requesting an FAQ sticky will be the easiest place to look.
     
  4. Jul 8, 2005 #3
    I am not sure about the definition of the infinity question. But for the second part: If you have 1/3 = .3333....., then 1/.333333..... = 3, so 3/3 = [1/.333333.....] / [1/.333333.....] which equals 1
     
  5. Jul 8, 2005 #4
    keep in mind infinity is not a number, but a limit. You can come arbitrarily close to infinity, but you can never reach it.
     
  6. Jul 8, 2005 #5

    Gokul43201

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    Much as it pains me to do this, I will have to move this thread from GD to Math.
     
  7. Jul 8, 2005 #6

    Integral

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    Actually I don't think you can get close to it. No matter how big a number you choose, infinity it still infinitely "far" away.
     
  8. Jul 8, 2005 #7

    Gokul43201

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    Yes.
    Yes again.
     
  9. Jul 9, 2005 #8
    your definition is better :smile: I like to think of it in the following way:

    let's say you have a=x/n . You can choose x to be the greatest number your imagination can muster (thus coming arbitrarily close to infinity). lim of a when n -> infinity will always be 0. So as you said, "infinity it still infinitely "far" away".
     
  10. Jul 9, 2005 #9

    mathwonk

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    is infinity a place? like oz?
     
  11. Jul 9, 2005 #10
    How many of these discussions do we have to have going on? Can't one of the moderators make a sticky and address this subject once and for all? Please.
     
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