Wiley signals and systems e book TLFe BO 539

524

Arivrlitlix A. Solutions to tlic Exrrciscs

Solution 13.5
x,

Y

a,) Z{.C[k

x[k

h

h

Solution 13.6

9,)= 0:

1y
x,,,
( z ) = __( Z T

Solution 13.7

Xi;) = 2 { r [ k ] } , ROC .
Then it follows wlth

> 0.5