Results 1 to 3 of 3

Math Help - Totally stuck and frustrated on this one! Try your hand at it!

  1. #1
    Newbie
    Joined
    Nov 2008
    Posts
    8

    Totally stuck and frustrated on this one! Try your hand at it!

    The seq of real numbers u1, u2, u3... is such that
    u(r+1) = u(r)/(1-r^2.u(r))

    Using method of differences, show that
    1/u1 - 1/u(N) = 1/6 (N-1)N(2N-1)
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Prove It's Avatar
    Joined
    Aug 2008
    Posts
    11,831
    Thanks
    1602
    Quote Originally Posted by zeromeyzl View Post
    The seq of real numbers u1, u2, u3... is such that
    u(r+1) = u(r)/(1-r^2.u(r))

    Using method of differences, show that
    1/u1 - 1/u(N) = 1/6 (N-1)N(2N-1)
    How about instead of telling us to "try our hand at it", you try your hand at it, show us what you've tried to do and where you're getting stuck?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Nov 2008
    Posts
    8
    To Prove It,

    Sorry if i gave the impression i didn't even try, but seriously the community's really great here and i'm looking forward to help others out in future..

    I tried my hand at it but only got into summation of recurrence terms- and though using method of differences pretty cuts it down alot, i just can't show the result. i do know that sum to n of r^2 is 1/6n(n+1)(2n+1).
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. totally stuck
    Posted in the Statistics Forum
    Replies: 5
    Last Post: September 28th 2009, 09:23 AM
  2. Trigonometry Help..... Totally stuck...
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: August 29th 2009, 07:23 PM
  3. Stuck and Frustrated!!!!
    Posted in the Algebra Forum
    Replies: 1
    Last Post: February 3rd 2009, 09:19 AM
  4. totally stuck
    Posted in the Algebra Forum
    Replies: 2
    Last Post: July 31st 2008, 02:05 PM
  5. totally frustrated
    Posted in the Algebra Forum
    Replies: 1
    Last Post: July 5th 2007, 10:37 AM

Search Tags


/mathhelpforum @mathhelpforum