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Tangent Theorem Help!

  1. May 10, 2005 #1
    Expired Thread...

    Delete Me........................................
    Last edited: May 10, 2005
  2. jcsd
  3. May 10, 2005 #2
    That way of doing it is confusing, but I would have a hard time giving an exact explanation why... If we must go into that, maybe this helps:

    In many cases, the most important issue is that dummy variables should be kept local, and should not interfere with other variables in your mathematical expression. In some cases, however, what is instead important is that different uses of the same dummy variable should not conflict. http://documents.wolfram.com/mathematica/book/section-2.7.5 [Broken]

    If that explanation DOES NOT HELP, what we really want to do is find the tangent to the slope and then substitute the value a for x. Thus, just look at x and x+h as h goes to zero.
    Last edited by a moderator: May 2, 2017
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