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how can i solve this problem give me a useful answer ASAP

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Adnan
Adnan 2014-10-22
编辑： Rick Rosson 2014-10-22
x[n]=-0.75u[n]
h[n]=a.^n.*u[-n-2]
-15<=n<=15 ; a=0.15.

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Rick Rosson
Rick Rosson 2014-10-22
编辑：Rick Rosson 2014-10-22
Here's a start:
n = -15:15;
x = zeros(size(n));
x(n>=0) = 0.75;
figure;
stem(n,x);
a = 0.15;
h = zeros(size(n));
h(...) = ...
figure;
stem(n,h);

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