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Math Help - [SOLVED] Simple inequality.

  1. #1
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    [SOLVED] Simple inequality.

    Why is |5+2(x-1)| \ge |5-2|x-1||?

    Did they use some triangle inequality here? I don't see how they got that.

    Nevermind, solved. Uses reverse-triangle inequality.
    Last edited by scorpion007; April 7th 2010 at 01:32 AM.
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