What is the first backward difference of y(n)? – McqOptions

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1.	What is the first backward difference of y(n)?
A.	[y(n)+y(n-1)]/T
B.	[y(n)+y(n+1)]/T
C.	[y(n)-y(n+1)]/T
D.	[y(n)-y(n-1)]/T
Answer» E.

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