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Help determining type of dicrete signal: power or energy signal

  1. Mar 19, 2012 #1
    1. The problem statement, all variables and given/known data
    Firstly, I'm sorry for my bad English - I'm from Bosnia and Herzegovina.
    I need help in determining type of two discrete signals. Here are problems:

    1)
    296kv1f.png

    2)
    2vumpfp.png

    I have tried, and I posted below where I stopped and what's confusing me.

    2. Relevant equations



    3. The attempt at a solution
    1)
    I got energy 9/8, using following equation:
    1zqx9px.png

    But when I'm trying to calculate power, I'm confused and I don't know how to solve it because then I have sum going from 0 to N (not to infinity). Can you please help me with this and explain how it goes.

    2)
    I got inifinity energy because I have sum from 0 to infinity of 1/n, and when n=0, 1/0 is infinity, and thats it. Am I right?

    But again I have problems with finding power. I got this, and I have no idea what now:
    epm2co.png


    I'm asking you for instructions, not solving problems and results - that woulnd't help me if I dont understand how to solve it and how did you get the result.

    Thank you in advance
     
  2. jcsd
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