The z-transform of a sequence x(n) which is given as X(z)= ( sum_{n=- infty}^{ infty}x(n)z^{-n} ) is known as _____________

The z-transform of a sequence x(n) which is given as X(z)= ( sum_{n=-

1.	The z-transform of a sequence x(n) which is given as X(z)= ( sum_{n=- infty}^{ infty}x(n)z^{-n} ) is known as _____________
A.	Uni-lateral Z-transform
B.	Bi-lateral Z-transform
C.	Tri-lateral Z-transform
D.	None of the mentioned
Answer» C. Tri-lateral Z-transform