Question

[ 1 3 9 -7 0 1 4 -3 2 1 -2 1] find basis for...

[ 1 3 9 -7
0 1 4 -3
2 1 -2 1]

find basis for col A. dimension of col A
find basis for nul A. dimension of nul A
find basis for row A. dimension of row A

asap plz, tyouuu
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