Results 1 to 4 of 4

Math Help - Exponent, to a negative exponent. Stroud problem.

  1. #1
    Newbie
    Joined
    Apr 2011
    Posts
    2

    Exponent, to a negative exponent. Stroud problem.

    Hi,

    I'm a little confused with a problem (very!) early on in the 5th edition of Stroud's Engineering Mathematics.

    F1 (pg. 69), #14c

    Write each of the following as a number raised to a power:

    The answer given is:

    Naively, I thought:





    Although I guess would be appropriate according to the wording of the question.

    Clearly I'm missing something fundamental, can someone please point me in the right direction?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    A Plied Mathematician
    Joined
    Jun 2010
    From
    CT, USA
    Posts
    6,318
    Thanks
    4
    Awards
    2
    I would say that, while your notation of

    (-4.-4.-4.-4)^{-4} isn't quite kosher, the idea is correct. I would write it as ((-4)(-4)(-4)(-4))^{-4}.

    In any case, your answer is correct. The answer of -4 is clearly wrong.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Apr 2011
    Posts
    2
    Argh, thank you. I guess I should have more confidence in myself . Thanks for the notation tips too, understood.

    Many thanks!
    Follow Math Help Forum on Facebook and Google+

  4. #4
    A Plied Mathematician
    Joined
    Jun 2010
    From
    CT, USA
    Posts
    6,318
    Thanks
    4
    Awards
    2
    You're welcome!
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Log question with negative exponent
    Posted in the Algebra Forum
    Replies: 2
    Last Post: December 13th 2009, 12:23 PM
  2. negative exponent
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: April 16th 2009, 08:23 PM
  3. Negative Exponent
    Posted in the Algebra Forum
    Replies: 5
    Last Post: January 2nd 2009, 07:44 AM
  4. Replies: 1
    Last Post: August 19th 2008, 08:41 AM
  5. negative exponent elimination
    Posted in the Algebra Forum
    Replies: 2
    Last Post: September 6th 2007, 05:07 AM

Search Tags


/mathhelpforum @mathhelpforum