What is the meaning of having a 3 by 3 matrix with determinent 0. Both geometrically and algebriaclly.
The matrix is singular.
No inverse matrix.
Geometrically: No unique point of intersection of planes, Either no common point, a line of intersection or the three planes coincide.
Alegebriacally: No unique solution either no solution or infinetly many solutions.
RM
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