It's been a while since I took Calc 2 and I am in a Linear Systems and Signals class right now. I'm looking at a solution on how to obtain a zero state response of a discrete time signal, but performing the summation confuses me. Can someone explain the steps they did?(adsbygoogle = window.adsbygoogle || []).push({});

This is part A

http://imageshack.us/photo/my-images/684/partal.jpg/

This is part B

http://imageshack.us/photo/my-images/11/part2sy.jpg/

In Part A, where did the +1 come from?

Also, how would you simplify the first fraction appearing after the equal sign of Ystep?

In Part B, where did the -1 's come from? Originally, h[m] was just (6/5)[itex]\sum[/itex](-1/2)^{m}+ (24/5)Ʃ(1/3)^{m}

I have a Final next week on this stuff so, any help would be appreciated.

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# Help with this Summation?

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