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Math question

Discussion in 'The OT' started by dorfd1, Mar 18, 2009.

  1. Mar 18, 2009 #21 of 156
    turey22

    turey22 Hall Of Fame

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    I have a calculator!!!!
     
  2. Mar 18, 2009 #22 of 156
    P Smith

    P Smith Mr. FixAnything

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    W.Mdtrn Sea
  3. Mar 18, 2009 #23 of 156
    Nick

    Nick Retired, part-time PITA DBSTalk Club

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    The...
    If you are standing exactly 5' from a tree and with each step you walk precisely
    half the distance toward the tree, how many steps will it take you to reach the tree?

    Answer: _____________


    You are standing at a place on the Planet Earth. You go south 1 mile, west 1 mile
    and north 1 mile, finding yourself back at the exact same spot where you began.
    Where are you?

    Answer: _____________


    What time is it?

    Answer: _____________


    .
     
  4. Mar 18, 2009 #24 of 156
    kokishin

    kokishin Godfather

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    Silicon...
    If you are standing exactly 5' from a tree and with each step you walk precisely half the distance toward the tree, how many steps will it take you to reach the tree?

    Answer: Technically, you won't. Practically, 3 steps.


    You are standing at a place on the Planet Earth. You go south 1 mile, west 1 mile and north 1 mile, finding yourself back at the exact same spot where you began. Where are you?

    Answer: North Pole


    What time is it?

    Answer: 15:08 in CA
     
  5. Mar 18, 2009 #25 of 156
    deltafowler

    deltafowler Duplicate User (Account Closed)

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    Infinity is an illusion. A mathematical farce set forth to intimidate students and lesser men.

    Any so-called infinite iteration of a number can be successfully and repeatedly calculated to it's absolute value at any point in time. Since infinity is a statement of time, no number is truly infinite.
     
  6. Mar 18, 2009 #26 of 156
    spartanstew

    spartanstew Dry as a bone

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    Just pointing out both sides of the argument.

    Actually, it doesn't. It's just the only way we can express it. No matter how many times you carry out the 3, it will still be a smaller number than 1/3. Just like .9999 (repeating) will always be a smaller number than 1. Always.
     
  7. Mar 18, 2009 #27 of 156
    Cholly

    Cholly Old Guys Rule! DBSTalk Club

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    Indian...
    The number .99999... is unique in that mathmeticians have come to agree that it is indeed equal to 1. Although I tend to distrust Wikipedia, here is a reference:
    http://en.wikipedia.org/wiki/0.999...
     
  8. Mar 18, 2009 #28 of 156
    tcusta00

    tcusta00 Active Member

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    Because fractions are rational numbers which are exact values and repeating decimals are irrational. Didn't anyone take algebra?

    (ok, so I cheated and confirmed with the math teacher sitting to my left :lol:)
     
  9. Mar 18, 2009 #29 of 156
    Stewart Vernon

    Stewart Vernon Roving Reporter Staff Member Super Moderator DBSTalk Club

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    I was going to post something similar. Basically it is just one of the many flaws/glitches in our defined mathematical system.

    By definition a ratio must be a rational number... however, we have many ratios that cannot be expressed as a rational number. This just exposes a flaw in the math, which no matter how you spin it, is a man-made constructed attempt to describe reality. It necessarily falls short from time to time.
     
  10. Mar 18, 2009 #30 of 156
    BobaBird

    BobaBird EKB Editor

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    I thought an irrational number was something like SQRT(-x).
     
  11. Mar 18, 2009 #31 of 156
    Richard King

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    ;)
     
  12. Mar 18, 2009 #32 of 156
    smiddy

    smiddy Tain't ogre til its ogre

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    10x ≠ 9.9; if x = 0.9; x = 9.9/10 in the second equation, or 0.99 = x ≠ 0.9, so I'm confused terribly. :) 0.9 x 10 = 9 not 9.9.
     
  13. Mar 18, 2009 #33 of 156
    turey22

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    Its k dont be confused...just keep drinking your beer! :lol:
     
  14. Mar 18, 2009 #34 of 156
    smiddy

    smiddy Tain't ogre til its ogre

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    Ok, thanks! :D
     
  15. Mar 18, 2009 #35 of 156
    Mike Bertelson

    Mike Bertelson 6EQUJ5 WOW! Staff Member Super Moderator DBSTalk Club

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    It all equal one.

    There is an inherent error in significant digits and rounding. ;)

    Why does dividing by zero give your calculator and error and yet theoretical physicists use it all the time. BTW, it isn’t undefined, it equals infinity.

    Mike
     
  16. Mar 18, 2009 #36 of 156
    smiddy

    smiddy Tain't ogre til its ogre

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    I was of the impression it was all relative. :D
     
  17. Mar 18, 2009 #37 of 156
    Mike Bertelson

    Mike Bertelson 6EQUJ5 WOW! Staff Member Super Moderator DBSTalk Club

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    Not any of my relatives. :D
     
  18. Mar 18, 2009 #38 of 156
    smiddy

    smiddy Tain't ogre til its ogre

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    Absolutely! :p

    <cough> I am trying too hard. :)
     
  19. Mar 18, 2009 #39 of 156
    4HiMarks

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    Repeating decimal are rational. It's the NON-repeating ones that are irrational. Remind me not to send any of my kids to the school where your math teacher teaches.
     
  20. Mar 18, 2009 #40 of 156
    4HiMarks

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    By definition, any ratio of natural numbers is a rational number. End of story.
     

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