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10 questions from this quiz
The identity matrix III
Its determinant must be non-zero
Singular
ad−bcad - bcad−bc
aaa and ddd (diagonal elements)
Transpose of the cofactor matrix
Checkerboard pattern of signs
B−1A−1B^{-1}A^{-1}B−1A−1
X=A−1BX = A^{-1}BX=A−1B
Only square matrices
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