Results 1 to 2 of 2

Thread: Progressions

  1. February 29th 2008, 11:08 AM #1
    bjhopper
    bjhopper is offline
    Super Member
    Joined
    Nov 2007
    Posts
    831
    Thanks
    13

    Progressions

    the sum of three consecutive terms of an arithmetic progression is 21.if these numbers are increased by 1,3, and 10 respectively, the resulting numbers form consecutive terms of a geometric proression. Find the numbers


    bj
    Follow Math Help Forum on Facebook and Google+
  2. February 29th 2008, 01:12 PM #2
    Plato
    Plato is offline
    MHF Contributor
    Joined
    Aug 2006
    Posts
    16,979
    Thanks
    771
    Awards
    1
    MHF Donor
    Quote Originally Posted by bjhopper View Post
    the sum of three consecutive terms of an arithmetic progression is 21.if these numbers are increased by 1,3, and 10 respectively, the resulting numbers form consecutive terms of a geometric proression. Find the number
    bjhopper, can you solve this system?
    \begin{array}{l}<br /> a + \left( {a + d} \right) + \left( {a + 2d} \right) = 21 \\ <br /> \frac{{a + 1}}{{a + d + 3}} = \frac{{a + d + 3}}{{a + 2d + 10}} \\ <br /> \end{array}<br />
    Follow Math Help Forum on Facebook and Google+
« Make 'N' the Subject | 8x »

Similar Math Help Forum Discussions

  1. progressions!
    Posted in the Algebra Forum
    Replies: 3
    Last Post: November 20th 2010, 04:41 PM
  2. Progressions
    Posted in the Statistics Forum
    Replies: 3
    Last Post: June 2nd 2010, 02:46 PM
  3. Progressions
    Posted in the Algebra Forum
    Replies: 3
    Last Post: May 1st 2010, 07:31 PM
  4. Progressions
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: December 23rd 2009, 08:38 AM
  5. please help with progressions :)
    Posted in the Algebra Forum
    Replies: 3
    Last Post: January 30th 2006, 08:26 AM

Search Tags


/mathhelpforum @mathhelpforum