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+//Scilab Code for Example 2.7 of Signals and systems by
+//P.Ramakrishna Rao
+//Unilateral Laplace Transform using partial fraction
+clear;
+clc;
+syms t s;
+s= %s;
+a1=pfss((s+3)/(s^2+3*s+2))
+f1=ilaplace(a1(1))
+f2=ilaplace(a1(2))
+fy=f1+f2
+disp(fy*'u(t)',"i) f(t)=")
+a2=pfss((2*s-1)/(s^2+2*s+1))
+a2(1)=2/(s+1)
+a2(2)=-3/(s+1)^2
+f1=ilaplace(a2(1))
+f2=ilaplace(a2(2))
+fz=f1+f2
+disp(fz*'u(t)',"ii) f(t)=")