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Thread: correct answer of the following equation

  1. #1
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    correct answer of the following equation

    Hi all,

    Can I find the correct answer to the following equation?

    $ E(t)=\int_{0}^{\infty} t(1-e^{-\lambda t}) dt$

    My answer is $ 1 / \lambda^2 $

    While the solution (in the paper I am reading) says the answer is: $1/ \lambda$

    I am sure that I am doing every thing right? Can someone tell me if the solution in the paper is wrong or am I doing it wrong?

    (Ignore the image, I cannot remove it from the thread, the eq. in the image is wrong)
    Attached Thumbnails Attached Thumbnails correct answer of the following equation-capture.jpg  
    Last edited by sjaffry; Sep 6th 2017 at 06:06 PM.
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  2. #2
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    New Zealand
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    Re: correct answer of the following equation

    Sorry, I have found that I was wrong, but could not delete my question...Is there any way to delete this stupid post...
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