Subject GRE-Style: Determinant Computation

GRE Math Subject · Axiom Academy

EXAMPLE Subject GRE-Style: Determinant Computation Computing a 3×3 determinant and using properties then equals which of the following? Use cofactor expansion along the first row: Step 2: Use Determinant Properties Combining both properties gives , which is choice (C) . Note: Determinant property problems reward knowing the scaling and inverse rules cold. Set up the chain of properties first, then plug in the single number at the end.

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