1,327 prompts matching "The discriminant used as the test for intersection"
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WAEC Prep: The identity matrix, and what it does in a product
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Worked Example: A singular matrix, and why it has no inverse
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WAEC Prep: The determinant of a matrix with a row of noughts
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WAEC Prep: The determinant of the identity matrix
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WAEC Prep: The determinant of a 3 by 3 matrix with two equal rows
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WAEC Prep: Expanding a 3 by 3 determinant along the first row
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Worked Example: Evaluating a 3 by 3 determinant by the rule of Sarrus
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WAEC Prep: The determinant Dz in a system of three unknowns
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WAEC Prep: What Cramer's rule gives when the system is inconsistent
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WAEC Prep: The cofactor of a corner entry
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WAEC Prep: Why the cofactor signs alternate
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WAEC Prep: The minor of an entry of a 3 by 3 matrix
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WAEC Prep: The adjoint of the identity matrix
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WAEC Prep: The order in which the cofactors are transposed
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Worked Example: The identity that A times its adjoint gives the determinant times the identity
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WAEC Prep: The inverse of a 2 by 2 matrix with a fractional determinant
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WAEC Prep: The inverse of an inverse
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WAEC Prep: How long the inverse of a 3 by 3 matrix takes, and how to shorten it
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WAEC Prep: The inverse of a 3 by 3 matrix from its adjoint and its determinant
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WAEC Prep: Reading the solution off the product of the inverse and the constants
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