Find A-1: also verify
AA-1 =A'A=I3
whereA =
[ 1 2 3
-1 0 4
0 2 2]
3×3 set
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9hauzgshjacausnasgjsbsgsusbsfsusbsgsuabsyskcdainaysjjdidvdubdgdjdbegh9 is the answer
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