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Interval Notation Problem

  1. Sep 4, 2013 #1

    Qube

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    Gold Member

    1. The problem statement, all variables and given/known data

    http://i.minus.com/jbiWoIFy45kCgV.png [Broken]

    2. Relevant equations

    The denominator of a function cannot equal 0. Both the numerator and denominator also cannot = 0 simultaneously.

    3. The attempt at a solution

    For the first problem, the denominator and the numerator are 0 when x =0. Hence, I excluded it from the domain. Similarly, for the second problem, the denominator is 0 when x = -8. It is also excluded from the domain. Am I missing something?
     
    Last edited by a moderator: May 6, 2017
  2. jcsd
  3. Sep 4, 2013 #2

    Dick

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    Science Advisor
    Homework Helper

    Yes, a little. You can't just look at the final formula. Take the first one. g(x) is undefined at x=(-1). If g(-1) is undefined then f(g(-1)) isn't defined either.
     
    Last edited by a moderator: May 6, 2017
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