<h1><div align=”center”><b>SubTopic: Critical Points</b></h1></div> <br/></br> <tab>file1_Critical_Point_of_a_function  <br/></br> <br/></br> <tab>file2_Traces_and_Tangent  <br/></br> <br/></br> <tab>file3_Tangent_plane_at_extrema_of_a_function  <br/></br> <br/></br> <tab>file4_Relative_Maximum_and_Relative_Minimum  <br/></br> <br/></br> <tab>file5_Saddle_Point  <br/></br> <br/></br> <tab>file6_f(x,y)=(y-x)(1-2x-3y) %3D(y-x)(1-2x-3y).gif?raw=true) <br/></br> <br/></br>