1 files changed, 34 insertions, 0 deletions
diff --git a/257/CH8/EX8.30/example_8_30.sce b/257/CH8/EX8.30/example_8_30.sce
new file mode 100644
index 000000000..37241f42f
--- /dev/null
+++ b/257/CH8/EX8.30/example_8_30.sce
@@ -0,0 +1,34 @@
+s=%s
+
+F=s^8+s^7+4*s^6+3*s^5+14*s^4+11*s^3+20*s^2+9*s+9
+disp(routh_t(F)) 
+r=coeff(F)
+routh=routh_t(F)
+n=length(r)
+c=0;
+for i=1:n
+if (routh(i,1)<0)
+c=c+1;
+ end 
+  end
+  if(c>=1)
+    printf("there are %d roots with positive real part as there are %d sign cganges",c+1,c+1)     //two number of sign changes
+  else printf("no roots with positive real part")
+  end
+
+
+P=1+s^1+3*s^2+2*s^3+5*s^4+3*s^5+1*s^6
+routh=routh_t(P)
+disp(routh)
+r=coeff(P)
+n=length(r)
+c=0;
+for i=1:n
+if (routh(i,1)<=0)
+c=c+1;
+ end 
+  end
+  if(c>=1)
+    printf("there are %d roots with positive real part",c+1)
+  else printf("no roots with positive real part")
+  end