Exponential Signal Discrete-Time Signals and Systems--Digital Signal Processing x(n)=a",Vn,a∈R For Example:x(n)=(0.9)”,0≤n≤10 n=[0:10];x=(0.9).n;stem(n,x,'ro） 0.8 0.6 0.4 0.2 0 0 1 2 3 4 567 89 10 x(n)=eorioo)n,Vn exp 上游充通大Discrete-Time Signals and Systems —— Digital Signal Processing Exponential Signal x n a n a R n ( )  ,  ;  For Example: x(n)  (0.9) , 0  n 10 n n=[0:10]; x=(0.9).^n; stem(n,x,’ro’) 0 1 2 3 4 5 6 7 8 9 10 0 0.2 0.4 0.6 0.8 1 x n e n j n    ( ) , ( )  0 exp