Results 1 to 4 of 4

Math Help - Converging series help

  1. #1
    Newbie lemonlime's Avatar
    Joined
    Jun 2010
    Posts
    3

    Converging series help

    Hey everyone, I don't know if I'm posting in the right section, but anyways..I am pretty bad with converging series and I need help with these questions



    Big thanks in advance!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Prove It's Avatar
    Joined
    Aug 2008
    Posts
    11,569
    Thanks
    1428
    Quote Originally Posted by lemonlime View Post
    Hey everyone, I don't know if I'm posting in the right section, but anyways..I am pretty bad with converging series and I need help with these questions



    Big thanks in advance!
    We're not here to do your homework for you. What have you tried?

    Comparison test, Ratio Test, Root Test, Lagrange Alternating Series Test are good tests for convergence...
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie lemonlime's Avatar
    Joined
    Jun 2010
    Posts
    3
    Well I know that if a series diverges then it reaches infinity, the converges part I gotta look for the series which has a limit, I plugged in the n=1 into the equation

    looking at the questions 1 (since its the easiest) the answer is C and D (right?) cause those two reaches a limit, I'm just a tad bit rusty for the rest of the questions, a lil tip would teach me a lot.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor

    Joined
    Apr 2005
    Posts
    15,707
    Thanks
    1470
    Quote Originally Posted by lemonlime View Post
    Well I know that if a series diverges then it reaches infinity
    Then you "know" something that is not true! For example the series \sum_{n=0}^\infty (-1)^n= 1- 1+ 1- 1+ \cdot\cdot\cdot neither converges nor "reaches infinity".

    , the converges part I gotta look for the series which has a limit, I plugged in the n=1 into the equation

    looking at the questions 1 (since its the easiest) the answer is C and D (right?) cause those two reaches a limit, I'm just a tad bit rusty for the rest of the questions, a lil tip would teach me a lot.
    I can see no sense in say series converge "because they reach a limit" sinced that is the definition of "converge". How do you know they "reach a limit"?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. series (converging)
    Posted in the Differential Geometry Forum
    Replies: 1
    Last Post: January 19th 2011, 02:44 AM
  2. Converging series
    Posted in the Calculus Forum
    Replies: 2
    Last Post: July 3rd 2010, 09:58 AM
  3. series..diverging, converging
    Posted in the Algebra Forum
    Replies: 4
    Last Post: March 4th 2009, 03:58 PM
  4. Converging series with factorials
    Posted in the Calculus Forum
    Replies: 2
    Last Post: December 20th 2008, 11:04 AM
  5. Converging series
    Posted in the Calculus Forum
    Replies: 3
    Last Post: April 12th 2008, 06:08 AM

Search Tags


/mathhelpforum @mathhelpforum