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+//Example 3.8
+//Partial fraction expansion for distinct real roots.
+
+clear;
+clc;
+//------------------------------------------------------------------
+//Partial fraction expansion for distinct real roots
+// Transfer function
+s=%s;
+num=(s+2)*(s+4)
+p1=s;
+p2=(s+1);
+p3=(s+3);
+sys=syslin('c',num/(p1*p2*p3))
+//------------------------------------------------------------------
+//Partial fraction expansion is: sys= r1/p1 + r2/p2 + r3/p3
+//residue calculation
+r1=residu(num,p1,(p2*p3))
+r2=residu(num,p2,(p1*p3))
+r3=residu(num,p3,(p1*p2))
+
+disp([r1 r2 r3]',"Residues of the poles p1, p2 and p3 are")
+disp([roots(p1), roots(p2), roots(p3)]',"Poles p1, p2 and p3 are at")
+disp('k=[]')
+
+//------------------------------------------------------------------