Results 1 to 2 of 2

Math Help - Can someone check this geometric series??

  1. #1
    Member
    Joined
    Nov 2006
    From
    chicago
    Posts
    156

    Can someone check this geometric series??

    Two infinite geometric series a + ar + ar^2 + ... and b + br + br^2 + ... have the same sum. Also, the second term of the second series is the first term of the first series. if r = 1/2 for the second series, find r for the first series.


    I got that the rate (r) of the first series is 2/3. Is this correct??

    a/(1-r) = b/(1-1/2)

    a = br

    r/(1-r) = 2

    r = 2/3


    thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Newbie bilalrouf's Avatar
    Joined
    Mar 2007
    Posts
    9

    ..

    Yes i think its correct.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 3
    Last Post: September 29th 2010, 06:11 AM
  2. Geometric Progression or Geometric Series
    Posted in the Math Topics Forum
    Replies: 8
    Last Post: October 8th 2009, 07:31 AM
  3. Replies: 11
    Last Post: April 1st 2008, 12:06 PM
  4. can someone check this infinite geometric
    Posted in the Algebra Forum
    Replies: 2
    Last Post: October 23rd 2006, 08:44 PM
  5. can someone check my work? geometric series
    Posted in the Algebra Forum
    Replies: 2
    Last Post: October 23rd 2006, 08:58 AM

Search Tags


/mathhelpforum @mathhelpforum