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

x[n]=-0.75u[n]

h[n]=a.^n.*u[-n-2]

-15<=n<=15 ; a=0.15.

[James Tursa]

I don't understand what you are asking. Try reading this first:

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

Answer 1

[Rick Rosson]

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);