Given 2 signals (-3)k u(k) and u (k-1). These two signals are superimposed. This superimposed signal is _______________

\(\frac{z}{z+3} – \frac{1}{z-1}\)

\(\frac{z}{z+3} + \frac{1}{z-1}\)

\(\frac{z}{z+3} – \frac{1}{z-1}\)

\(\frac{z}{z-3} + \frac{1}{z-1}\)

\(\frac{z}{z+3} + \frac{1}{z+1}\)

Given 2 signals (-3)k u(k) and u (k-1). These two signals are superim

1.	Given 2 signals (-3)k u(k) and u (k-1). These two signals are superimposed. This superimposed signal is _______________
A.	\(\frac{z}{z+3} + \frac{1}{z-1}\)
B.	\(\frac{z}{z+3} – \frac{1}{z-1}\)
C.	\(\frac{z}{z-3} + \frac{1}{z-1}\)
D.	\(\frac{z}{z+3} + \frac{1}{z+1}\)
Answer» B. \(\frac{z}{z+3} – \frac{1}{z-1}\)