1.

Which of the following is a recursive form of a non-recursive system described by the equation y(n)= ( frac{1}{M+1} sum_{k=0}^Mx(n-k) )?

A. y(n)=y(n-1)+ ( frac{1}{M+1} )[x(n)+x(n-1-M)]
B. y(n)=y(n-1)+ ( frac{1}{M+1} )[x(n)+x(n-1+M)]
C. y(n)=y(n-1)+ ( frac{1}{M+1} )[x(n)-x(n-1+M)]
D. y(n)=y(n-1)+ ( frac{1}{M+1} )[x(n)-x(n-1-M)]
Answer» E.


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