x(-1月n+] x[-1], x[-1]6[n+1]= 0, (c) x[0]8(n] x[0], n=0 0m={ 0, n≠0 -4-3-2-101234 (d) xf116n-10 xn-= x[1], n=-1… n≠- 1401 (e) x2n-2 2n-207 2 n≠-2 3 )[ 1], 1 [ 1] [ 1] 0, 1 x n x n n δ  − =− − +=  ≠ − [0], 0 [0] [ ] 0, 0 x n x n n δ  = =  ≠ [1], 1 [1] [ 1] 0, 1 x n x n n δ  = − − =  ≠ − [2], 2 [2] [ 2] 0, 2 x n x n n δ  = − − =  ≠ −