Let X be Poisson with Parameter λ

Compute the mean of (1+X)^-1.

thanks

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- Feb 16th 2009, 01:24 AMadirhproblem with calculating expected value
Let X be Poisson with Parameter λ

Compute the mean of (1+X)^-1.

thanks - Feb 16th 2009, 02:16 AMmr fantastic
- Feb 16th 2009, 08:00 AMadirhthanks but...
first of all thanks for the answer but...

The answer (i have a only the final answer) is λ^-1(1- e^-λ) and

http://www.mathhelpforum.com/math-he...b063f661-1.gif you said that

so isn't the sum above shoudnt be (1- e^-λ) instead of 1???d

thanks again - Feb 16th 2009, 08:21 AMMoo
- Feb 16th 2009, 10:52 AMmr fantastic