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Homework Help: Modulus inequality help

  1. Jul 6, 2008 #1
    1. The problem statement, all variables and given/known data
    Solve [tex] | \frac{x}{2} +3 | > 3-x^2 [/tex]
    Hence, solve [tex] | \frac{e^x}{2} -3 | > 3-e^{2x}[/tex]

    2. Relevant equations

    3. The attempt at a solution

    I've solved the first part. But I have no clue what is the link to the second part?! could there be just typo to the question?? I can't find any links...
  2. jcsd
  3. Jul 6, 2008 #2


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    Homework Helper

    Let u=e^x

    and it becomes

    [tex]|\frac{u}{2} +3 | > 3-u^2 [/tex]
  4. Jul 6, 2008 #3
    Didn't help.

    Anyway I figured the solution already.

    should be let [tex]u= - e^x [/tex]
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