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Homework Help: Expressing a power

  1. Feb 13, 2007 #1
    Express e in terms of c and d if [tex]2^{c}4^{d} = 8^{e}[/tex]

    Can someone give me step by step advice on how to answer this?
     
  2. jcsd
  3. Feb 13, 2007 #2

    HallsofIvy

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    4= 22 so 4d= (22)d= 22d. 8= 23 so 8e= (23)e= 23e.
     
    Last edited by a moderator: Feb 14, 2007
  4. Feb 13, 2007 #3
    I dont get

    [tex](2^{3})^{e}= 3^{3e}[/tex]

    I see that 2³ = 8 and [tex](^{e})^{3}[/tex] is [tex]^{3e}[/tex], but how can that be [tex]3^{3e}[/tex]
    ?



    P.S Can i ask, the dot in the middle of a line, is it suppost to represent a new equaion?
     
  5. Feb 14, 2007 #4

    HallsofIvy

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    That was a typo. I have corrected it.
     
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