Results 1 to 3 of 3

Math Help - Find the sum of the infinite serises

  1. #1
    Newbie
    Joined
    Apr 2011
    Posts
    4

    Find the sum of the infinite serises

    4-3+(9/4)-(27/16)+(81/64)-

    i think i need to figure out the sigma notation first, then off to solve the sum with using the calculator

    but the problem is that i can't even find the pattern to write the notation

    the rule An = A1 + (n-1)(d) doesn't work in this problem b/c the number is NOT constantly increasing

    anyone could give a hand to help me out here?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,236
    Thanks
    28
    What patterns can you see here?

    hint 3^n/4^n
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,605
    Thanks
    1573
    Awards
    1
    Quote Originally Posted by cwlcwl1212 View Post
    4-3+(9/4)-(27/16)+(81/64)-
    Look at
    .

    Write out at least five terms to see what is going on.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 1
    Last Post: June 2nd 2010, 09:49 AM
  2. [SOLVED] Find sum of infinite series?
    Posted in the Calculus Forum
    Replies: 6
    Last Post: April 28th 2009, 09:33 AM
  3. Proof: infinite set minus a fintie set is infinite
    Posted in the Discrete Math Forum
    Replies: 1
    Last Post: February 24th 2009, 10:54 PM
  4. find area of infinite circles
    Posted in the Calculus Forum
    Replies: 2
    Last Post: February 20th 2009, 03:35 PM
  5. find sum of infinite geometric series
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: December 6th 2007, 10:28 PM

Search Tags


/mathhelpforum @mathhelpforum