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Math Help - array

  1. #1
    Member Greengoblin's Avatar
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    array

    Why doesn't this work?....


    f^{-1}(x)= \left \{ \begin{array}{ll} x & \text{if x $\ge$ 0} \\ -x & \text{if x $<$ 0}\end{array} \right

    (quote me)
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  2. #2
    Rhymes with Orange Chris L T521's Avatar
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    Quote Originally Posted by Greengoblin View Post
    Why doesn't this work?....


    f^{-1}(x)= \left \{ \begin{array}{ll} x & \text{if x $\ge$ 0} \\ -x & \text{if x $<$ 0}\end{array} \right.

    (quote me)
    You need this:

    [tex]f^{-1}(x)= \left \{ \begin{array}{ll} x & \text{if x $\ge$ 0} \\ -x & \text{if x $<$ 0}\end{array} \right.[/tex]

    The period makes all the difference.

    --Chris
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  3. #3
    Member Greengoblin's Avatar
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    thanks
    Last edited by ThePerfectHacker; October 8th 2008 at 01:46 PM.
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  4. #4
    Math Engineering Student
    Krizalid's Avatar
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    See in this place my thread "some tips." You'll find something related of.
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