The general linear constant coefficient difference equation characterizing an LTI discrete time system is?

y(n)=- ( sum_{k=0}^N a_k y(n-k)+ sum_{k=0}^N b_k x(n-k) )

y(n)=- ( sum_{k=1}^N a_k y(n-k)+ sum_{k=0}^N b_k x(n-k) )

y(n)=- ( sum_{k=0}^N a_k y(n-k)+ sum_{k=0}^N b_k x(n-k) )

y(n)=- ( sum_{k=1}^N a_k y(n)+ sum_{k=0}^N b_k x(n) )

The general linear constant coefficient difference equation characteri

1.	The general linear constant coefficient difference equation characterizing an LTI discrete time system is?
A.	y(n)=- ( sum_{k=1}^N a_k y(n-k)+ sum_{k=0}^N b_k x(n-k) )
B.	y(n)=- ( sum_{k=0}^N a_k y(n-k)+ sum_{k=0}^N b_k x(n-k) )
C.	y(n)=- ( sum_{k=1}^N a_k y(n)+ sum_{k=0}^N b_k x(n) )
D.	None of the mentioned
Answer» B. y(n)=- ( sum_{k=0}^N a_k y(n-k)+ sum_{k=0}^N b_k x(n-k) )