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Use the formal definition of limits

  1. Oct 1, 2011 #1
    1. The problem statement, all variables and given/known data
    Use The Formal definition of limits to show
    attachment.php?attachmentid=39471&stc=1&d=1317483256.png

    2. Relevant equations
    The Formal definition of limits


    3. The attempt at a solution

    Tried to do it like this, but that was wrong. What do i need to do different?
    attachment.php?attachmentid=39472&stc=1&d=1317483656.jpg
     

    Attached Files:

  2. jcsd
  3. Oct 1, 2011 #2

    vela

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    What you wrote has little resemblance to a proof. A proof is an argument showing that some statement is true. First, you should identify what statement it is you're trying to prove. Second, and this is key, you need to write a coherent argument where it's logically clear how you started from the givens and reached the conclusion.

    You may find this video helpful:

     
    Last edited by a moderator: Sep 25, 2014
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