
Consider thc discrcto-timc signal x(n) = n(u(n)u(-n + 4)), (a) Skctch x(n). (b) Determine the energy of x(n). (c) Find the z-transform of z(n). Indicate the region of convergence. Hint: Express the signal as (n)np,(n), where ps (n) is a pulse sequence. (d) Does r(n) have a
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