Question: What is the particular solution of the first order difference equation y(n)+ay(n-1)=x(n) where |a|<1, when the input of the system x(n)=u(n)?
Options
A : frac{1}{1+a} u(n)
B : frac{1}{1-a} u(n)
C : frac{1}{1+a}
D : frac{1}{1-a}
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