1 files changed, 10 insertions, 0 deletions
diff --git a/104/CH5/EX5.21/5_21.sce b/104/CH5/EX5.21/5_21.sce
new file mode 100755
index 000000000..f109bb2b8
--- /dev/null
+++ b/104/CH5/EX5.21/5_21.sce
@@ -0,0 +1,10 @@
+//observability
+A=[-2 0;0 -1]
+B=[3;1]
+C=[1 0]
+V=[C;C*A]
+if det(V)==0 then
+    printf("system is unobservable")
+else 
+    printf("system is observable")
+    end
+\ No newline at end of file