(New page: Category:ECE438Fall2011Boutin Category:problem solving = Simplify this summation= <math>u[n] \sum_{k=-7}^{15} \delta [n-k]. </math> (Justify your answer.) ---- ==Share your answe...) |
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===Answer 1=== | ===Answer 1=== | ||
| − | + | First off u[n] is nonzero for any value of n >= 0. The delta function is nonzero only for when n-k=0 or n=k. Since n must be >=0 then the values of k must conform to 0=<k<=15. This makes the function behave like u[n]-u[n-15]. I am not sure if this is completely correct. | |
===Answer 2=== | ===Answer 2=== | ||
Write it here. | Write it here. | ||
Revision as of 16:19, 25 August 2011
Contents
Simplify this summation
$ u[n] \sum_{k=-7}^{15} \delta [n-k]. $
(Justify your answer.)
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Answer 1
First off u[n] is nonzero for any value of n >= 0. The delta function is nonzero only for when n-k=0 or n=k. Since n must be >=0 then the values of k must conform to 0=<k<=15. This makes the function behave like u[n]-u[n-15]. I am not sure if this is completely correct.
Answer 2
Write it here.
Answer 3
write it here.
