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-rwxr-xr-x104/CH5/EX5.7/5_7.sce5
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diff --git a/104/CH5/EX5.7/5_7.sce b/104/CH5/EX5.7/5_7.sce
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+//characteristic equation from transfer function
+s=%s
+sys=syslin('c',1/(s^3+5*s^2+s+2))
+c=denom(sys)
+disp(c,"characteristic equation=") \ No newline at end of file