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 Pre-Calculus and Calculus
 CONVOLUTION! need help desperately will pay money!
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Average Member

14 Posts

Posted - 01/29/2011 :  22:06:04  Show Profile  Reply with Quote
Hi guys,
I really need to understand this as soon as possible so I don't get screwed and left behind in the lectures..

I have2 problems:

z(t)=[e^(-t)*u(t)] * [e^(-t)*u(t)]

I got the answer 1 but for some reason I don't think that's right.. I know that when you analyze it graphically z=0 for t<0 and for t>0 i had my bounds go from 0 to infinity of e^-(t)dt

2nd) [t*e^(-t)*u(t)]*[2*u(t+.5)-2*u(t-.5)]

For this one for my boundaries for when 0<t<1 i used 0 to t
and for t>1 I used t-1 to t as my boundaries since thats the width of the unit pulse. however, i'm know thats not right because i graphed them and the area comes out all funky. I think it's wrong because it has somtehing to do with the .5 shifts on both sides instead of just the shift of 1 to the right..

If someone could help out that would be amazing and I will honestly pay you if you'd like
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Advanced Member

299 Posts

Posted - 02/11/2011 :  17:27:22  Show Profile  Reply with Quote
I am sure you will find all kinds of material on the net. I did.
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