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1. |
What is the step response of the system y(n)=ay(n-1)+x(n) -1<a<1, when the initial condition is y(-1)=1? |
A. | ( frac{1}{1-a} )(1+a<sup>n+2</sup>)u(n) |
B. | ( frac{1}{1+a} )(1+a<sup>n+2</sup>)u(n) |
C. | ( frac{1}{1-a} )(1-a<sup>n+2</sup>)u(n) |
D. | ( frac{1}{1+a} )(1-a<sup>n+2</sup>)u(n) |
Answer» D. ( frac{1}{1+a} )(1-a<sup>n+2</sup>)u(n) | |