Number 2

Describe the vectors in the column space and nullspace of the following:

In[83]:=

  a2={{1,0,-1,3,-1},{1,0,0,2,-1},{2,0,-1,5,-1},{0,0,-1,1,0}};
  MatrixForm[a2]

Out[83]=

  1    0    -1   3    -1
  
  1    0    0    2    -1
  
  2    0    -1   5    -1
  
  0    0    -1   1    0

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