Results 1 to 3 of 3

Math Help - summation exponential functions

  1. #1
    Newbie
    Joined
    Apr 2008
    Posts
    24

    summation exponential functions

    Dear members,

    see attached pdf file.Can you help me to prove these sums.

    Thank you

    Gilbert
    Attached Files Attached Files
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member
    Joined
    Feb 2013
    From
    Saudi Arabia
    Posts
    443
    Thanks
    86

    Re: summation exponential functions

    Gilbert

    The first series is the sum of infinite terms of a geometric sequence whose first term is a = e^(-z) and ratio also r = e^(-z) this sequence is a decreasing sequence
    and as you probably know the sum of infinite terms os such a sequence is given by the formula S =a/1-r .
    Apply this formula and you will have the first summ in front of you...good luck with the other...don't expect every thing from us...do some homework as well.

    MINOAS
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Senior Member
    Joined
    Feb 2013
    From
    Saudi Arabia
    Posts
    443
    Thanks
    86

    Re: summation exponential functions

    Gilbert

    I forgot to mention that the second series is almost similar to the first....maybe you have to split it in two series....it is really easy. the solution is in one line
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 0
    Last Post: April 29th 2012, 03:08 PM
  2. Replies: 2
    Last Post: June 9th 2011, 10:54 AM
  3. Exponential functions help
    Posted in the Calculus Forum
    Replies: 4
    Last Post: November 2nd 2009, 02:16 AM
  4. exponential functions
    Posted in the Algebra Forum
    Replies: 1
    Last Post: August 24th 2009, 07:09 PM
  5. CDF of random summation of exponential radom variables
    Posted in the Advanced Statistics Forum
    Replies: 2
    Last Post: February 27th 2009, 10:38 AM

Search Tags


/mathhelpforum @mathhelpforum