Inequalities

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  1. liquid394's Avatar
    1 30-05-2012  16:33
    • Exalted Member
    • Posts: 384
    Inequalities
    such a stupid question to ask, but when do you need to switch the sign, as I have some how forgotten?
  2. notnek's Avatar
    2 30-05-2012  16:37
    • TSR Demigod
    • Location: Bangkok, Thailand
    Re: Inequalities
    If you multiply or divide an inequality by a negative number, you must switch the signs around e.g.

    \displaystyle -2x>6 \implies x<-3


    \displaystyle \frac{y}{-4}\leq 2 \implies y\geq -8
    Last edited by notnek; 30-05-2012 at 16:43.
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