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How to?

  1. Sep 12, 2006 #1

    Nub

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    I dont get it...

    For which value of x is each rational expression not defined?

    a) 3/x

    are you supposed to solve for x? or?
     
  2. jcsd
  3. Sep 12, 2006 #2

    HallsofIvy

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    What if x= 0? Have you learned how to divide by 0?
     
  4. Sep 13, 2006 #3
    Wherever either the denominator turns into something you can't divide by (a.k.a zero) or some other operation becomes impossible, like a zero in a log or negative in a square root etc. Basically wherever the graph doesn't have a y-value for the x-value. in a 3/x you REALLY can tell. if you never looked at a rational function and you're used with the linears, it comes as a shock...:)
     
  5. Sep 13, 2006 #4

    lo2

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    Chuch Norris can divide by 0...Go ask him how to.
     
  6. Sep 13, 2006 #5

    HallsofIvy

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    He can probably spell his own first name, too.
     
  7. Sep 13, 2006 #6

    lo2

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    Yeah probaly...
     
  8. Sep 13, 2006 #7

    Nub

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    Yeah i know how to do it now. Thanks anyways guys. Ill keep your site under favourites so if theres anything I'll be sure to give you guys a click o:)

    :biggrin:
     
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