Nine Exercises
Locating the IDENTITY SUB-MATRIX

Nine simplex tableaus are shown, with links to the earlier exercises which created them. For each problem, you must name the columns containing the IDENTITY SUB-MATRIX. You may want to review a general discussion of how to do this.

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[1] Highlighted below is the tableau resulting from row operations in the previous step. Click below on whichever TWO buttons (x1, x2, x3, s1, s2) name columns of the IDENTITY SUB-MATRIX.
 

  Name ISM columns
 
  

[2] Highlighted below is the tableau resulting from row operations in the previous step. Click below on whichever TWO buttons (x1, x2, s1, s2) name columns of the IDENTITY SUB-MATRIX.
 

  Name ISM columns
 
  

[3] Highlighted below is the tableau resulting from row operations in the previous step. Click below on whichever TWO buttons (x1, x2, s1, s2) name columns of the IDENTITY SUB-MATRIX.
 

  Name ISM columns
 
  

[4] Highlighted below is the tableau resulting from row operations in the previous step. Click below on whichever TWO buttons (x1, x2, s1, s2) name columns of the IDENTITY SUB-MATRIX.
 

  Name ISM columns
 
  

[5] Highlighted below is the tableau resulting from row operations in the previous step. Click below on whichever TWO buttons (x1, x2, x3, s1, s2) name columns of the IDENTITY SUB-MATRIX.
 

  Name ISM columns
 
  

[6] Highlighted below is the tableau resulting from row operations in the previous step. Click below on whichever TWO buttons (x1, x2, s1, s2) name columns of the IDENTITY SUB-MATRIX.
 

  Name ISM columns
 
  

[7] Highlighted below is the tableau resulting from row operations in the previous step. Click below on whichever TWO buttons (x1, x2, s1, s2) name columns of the IDENTITY SUB-MATRIX.
 

  Name ISM columns
 
  

[8] Highlighted below is the tableau resulting from row operations in the previous step. Click below on whichever TWO buttons (x1, x2, x3, s1, s2) name columns of the IDENTITY SUB-MATRIX.
 

  Name ISM columns
 
  

[9] Highlighted below is the tableau resulting from row operations in the previous step. Click below on whichever TWO buttons (x1, x2, s1, s2) name columns of the IDENTITY SUB-MATRIX.
 

  Name ISM columns