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Homework Help: Easy Pre-Calc Question - Natural Logs

  1. Oct 11, 2004 #1
    [tex]e^{-x^2}=(e^x)^3(\frac{1}{e^4})[/tex]


    Wouldn't all the Es cancel out?
    [tex]-x^2=3x-4[/tex]

    Move the 3x and factor out a -x:
    [tex]-x(x+3)=-4[/tex]

    Now I got nothing.
     
  2. jcsd
  3. Oct 11, 2004 #2
    try moving the -x^2 over to the right side.
     
  4. Oct 11, 2004 #3
    OHHHH....
    [tex]0=-x^2+3x-4[/tex]

    Do a little factorin'
    [tex](x+4)(x-1)[/tex]

    [tex]x=-4 or x=1[/tex]

    Both of those are the answer, right, or is there a restriction on x?
     
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