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Make the method random

  1. Apr 2, 2010 #1
    Can someone give me a little test problem? An easy one please, I'm new to this lol.
    Make the method random, so I have to try all three. Sub,Fac,Conj
     
  2. jcsd
  3. Apr 2, 2010 #2

    LCKurtz

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    Re: Limits

    [tex]lim_{x\rightarrow 4}\frac {2x-8}{\sqrt x - 2}[/tex]
     
  4. Apr 3, 2010 #3
    Re: Limits


    Uhh, I doubt I got it right lol butttt


    0/2?

    If I didn't get it right, can you show me how to do it please? I'm trying to learn calculus by myself... lol I know. I just really want to learn it.
     
  5. Apr 3, 2010 #4

    LCKurtz

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    Re: Limits

    No, that isn't right. And even though it's wrong, you would normally simplify 0/2 wouldn't you?

    I'll give you a hint. Try rationalizing the denominator.
     
  6. Apr 3, 2010 #5
    Re: Limits

    lol, Like I said.. Can you show me how to do it.

    I seriously just kinda started learning this stuff by myself. I can grasp it, if someone can show me the steps. If I can see the steps, I can understand it. Unless there are certain rules of course that go along with it but those are technically steps.

    I don't see how I can rationalize it.
     
  7. Apr 3, 2010 #6
    Re: Limits

    Haha, that kind of problem haunted me for a long time.

    It is specifically because of those problems I appreciate the beauty of the number 1 and the amazing cleverness of it. It also illuminated all that complex multiplication I memorized without a thought to the why :biggrin:

    Anyway, www.khanacademy.org has some amazing videos on limits, you should watch them all to get a grasp of what you're doing.

    I'll quote something from my book that I think was just a great real life description of limits;

     
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