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Simple Logarithmic Question

  1. Aug 31, 2010 #1
    5fdsQ.png

    I am unsure of how they were able to change 8.7 to 8 and make -2.3 to 2. Whats the explanation behind this?
     
  2. jcsd
  3. Sep 1, 2010 #2

    CRGreathouse

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    Science Advisor
    Homework Helper

    It's not that 8.7 was changed to 8, but that [tex]\lfloor8.7\rfloor[/tex] was changed to 8,since 8.7 rounded down is 8.
     
  4. Sep 1, 2010 #3

    Mark44

    Staff: Mentor

    And [tex]\lceil -2.3 \rceil[/tex] is rounded up to -2.
     
  5. Sep 1, 2010 #4
    Ohhhh I didnt even notice those were the ceiling and floor functions, I thought they were just brackets! Thanks!
     
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