Results 1 to 2 of 2

Math Help - series doubt

  1. #1
    Junior Member
    Joined
    Jul 2009
    Posts
    57

    series doubt

    Given a sequence a1, a2........ an. If a1 = 25 & in the sequence if every number is '-2' times the preceding number,

    then Col A: a100 Col B: -10,000 which of both are great ..i did for a100 as 25(-2^99) so Col is bigger is it correct
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by bluffmaster.roy.007 View Post
    Given a sequence a1, a2........ an. If a1 = 25 & in the sequence if every number is '-2' times the preceding number,

    then Col A: a100 Col B: -10,000 which of both are great ..i did for a100 as 25(-2^99) so Col is bigger is it correct
    Since 25\times (-2)^{99} \approx -1.6 \times 10^{31} < -10000

    CB
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Series summation doubt
    Posted in the Calculus Forum
    Replies: 6
    Last Post: December 18th 2010, 11:59 PM
  2. my doubt in IT
    Posted in the Math Software Forum
    Replies: 2
    Last Post: June 28th 2010, 01:35 AM
  3. Doubt
    Posted in the Statistics Forum
    Replies: 1
    Last Post: November 7th 2007, 02:13 PM
  4. doubt
    Posted in the Algebra Forum
    Replies: 2
    Last Post: August 11th 2007, 08:29 AM
  5. doubt
    Posted in the Calculus Forum
    Replies: 12
    Last Post: October 12th 2006, 04:59 PM

Search Tags


/mathhelpforum @mathhelpforum