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+<h1><div align=”center”><b>SubTopic: The Second Derivative Test</b></h1></div>
+<br/></br>
+
+<tab>file1_Second_order_partial_derivatives
+
+![file1_Second_order_partial_derivatives](https://github.com/vnb09/FSF-mathematics-python-code-archive/blob/fsf_tasks/FSF-2020/calculus-of-several-variables/approximations-and-optimizations/The-Second-Derivative-Test/file1_Second_order_partial_derivatives.gif?raw=true)
+<br/></br>
+<br/></br>
+
+<tab>file2_Nondegenerate_Hessian_Matrix
+ 
+![file2_Nondegenerate_Hessian_Matrix](https://github.com/vnb09/FSF-mathematics-python-code-archive/blob/fsf_tasks/FSF-2020/calculus-of-several-variables/approximations-and-optimizations/The-Second-Derivative-Test/file2_Nondegenerate_Hessian_Matrix.gif?raw=true)
+<br/></br>
+<br/></br>
+
+<tab>file3_Degenerate_Hessian_Matrix
+ 
+![file3_Degenerate_Hessian_Matrix](https://github.com/vnb09/FSF-mathematics-python-code-archive/blob/fsf_tasks/FSF-2020/calculus-of-several-variables/approximations-and-optimizations/The-Second-Derivative-Test/file3_Degenerate_Hessian_Matrix.gif?raw=true)
+<br/></br>
+<br/></br>
+
+<tab>file4_Contour_Diagram
+ 
+![file4_Contour_Diagram](https://github.com/vnb09/FSF-mathematics-python-code-archive/blob/fsf_tasks/FSF-2020/calculus-of-several-variables/approximations-and-optimizations/The-Second-Derivative-Test/file4_Contour_Diagram.gif?raw=true)
+<br/></br>
+<br/></br>
+