If X1(n), x2(n) and x3(m) are three sequences each of length N whose DFTs are given as X1(k), X2(k) and X3(k) respectively and X3(k)=X1(k).X2(k), then what is the expression for x3(m)?

( sum_{n=0}^{N-1}x_1 (n) x_2 (m+n)_N )

( sum_{n=0}^{N-1}x_1 (n) x_2 (m+n) )

( sum_{n=0}^{N-1}x_1 (n) x_2 (m-n) )

( sum_{n=0}^{N-1}x_1 (n) x_2 (m-n)_N )

( sum_{n=0}^{N-1}x_1 (n) x_2 (m+n)_N )

If X1(n), x2(n) and x3(m) are three sequences each of length N whose D

1.	If X₁(n), x₂(n) and x₃(m) are three sequences each of length N whose DFTs are given as X₁(k), X₂(k) and X3(k) respectively and X3(k)=X₁(k).X₂(k), then what is the expression for x₃(m)?
A.	( sum_{n=0}^{N-1}x_1 (n) x_2 (m+n) )
B.	( sum_{n=0}^{N-1}x_1 (n) x_2 (m-n) )
C.	( sum_{n=0}^{N-1}x_1 (n) x_2 (m-n)_N )
D.	( sum_{n=0}^{N-1}x_1 (n) x_2 (m+n)_N )
Answer» D. ( sum_{n=0}^{N-1}x_1 (n) x_2 (m+n)_N )