Results 1 to 3 of 3

Math Help - Nonzero numbers? (587)

  1. #1
    Member
    Joined
    Sep 2008
    Posts
    222

    Nonzero numbers? Thanks to Jameson!

    If a, b, c, and f are four nonzero numbers then all of the following proportions are equivalent EXCEPT

    a) \frac {a}{f}  = \frac{b}{c}

    b) \frac {f}{c}  = \frac{b}{a}

    c) \frac {c}{a}  = \frac{f}{b}

    d) \frac {a}{c}  = \frac{b}{f}

    e) \frac {af}{bc}  = 1

    Can someone please show me the steps? Does nonzero numbers simply mean numbers that can't equal to zero?
    Thanks in advance
    Last edited by fabxx; September 22nd 2008 at 11:59 PM.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Oct 2005
    From
    Earth
    Posts
    1,599
    I think there's a big chunk of the problem missing
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor
    Joined
    Oct 2005
    From
    Earth
    Posts
    1,599
    Yes, non-zero simply means not 0.

    Let's start by finding two which ARE equal. Look at D) and E).

    Cross multiply C) and you get af=cb. Do you know how to cross multiply? Now for E) multiply everything by bc and you get af=cb. So, good we've found two that match and a true statement to compare others to. Cross multiply C) and you get... af=cb, good. B) do the same thing and we get ... af=cb, awesome.

    Now for A), cross multiply and we get ac=bf. UH OH. Found the different one.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Finding nonzero matrices that result in AB=0
    Posted in the Advanced Algebra Forum
    Replies: 3
    Last Post: April 11th 2011, 01:32 PM
  2. Replies: 4
    Last Post: April 1st 2011, 04:49 PM
  3. IBVP with a nonzero BCs
    Posted in the Differential Equations Forum
    Replies: 1
    Last Post: September 26th 2010, 05:23 AM
  4. Let C* be the set of all nonzero complex numbers a+bi
    Posted in the Advanced Algebra Forum
    Replies: 1
    Last Post: March 17th 2010, 05:45 PM
  5. nonzero torsion elements
    Posted in the Advanced Algebra Forum
    Replies: 1
    Last Post: November 8th 2008, 11:44 PM

Search Tags


/mathhelpforum @mathhelpforum