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iztrans not giving correct result?

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ABTJ
ABTJ 2019-5-29
回答： KALYAN ACHARJYA 2019-5-29
I wrote a program to first find out z transform X of input x and then secondly applied inverse z transform to X to get back original x but when i use the iztrans command , i do not get the original input as shown highlighted in attached phot. My code is as follow
clc
clear all
close all
syms z n
x=n^2*heaviside(n) % original input
X=ztrans(x,z) % z transform of input
x1=iztrans(X,n) % Application of inverse z transform to get back original input

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KALYAN ACHARJYA
KALYAN ACHARJYA 2019-5-29
Check here

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