Question: What is the second difference that is used to replace the second order derivate of y(t)?
Options
A : [y(n)-2y(n-1)+y(n-2)]/T
B : [y(n)-2y(n-1)+y(n-2)]/T2
C : [y(n)+2y(n-1)+y(n-2)]/T
D : [y(n)+2y(n-1)+y(n-2)]/T2
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