1,324 prompts matching "Closure on a set of three elements under a stated rule"
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Worked Example: Evaluating a 3 by 3 determinant by the rule of Sarrus
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Explain Back: What a coefficient determinant of nought says about the system
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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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Explain Back: Writing out the full matrix of cofactors
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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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WAEC Prep: The adjoint as the transpose of the matrix of cofactors
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Explain Back: Finding the adjoint of a 2 by 2 matrix quickly
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WAEC Prep: The inverse of an inverse
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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: A three-unknown system arising from a word problem
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WAEC Prep: When the matrix method is worth the work for three unknowns
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Worked Example: The units of mass, and the SI unit
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Worked Example: The weight of a body as mass times g
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WAEC Prep: The resultant of two equal forces at sixty degrees
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WAEC Prep: The resultant of two forces acting at the same point
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Explain Back: The resultant of two forces acting in the same straight line
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WAEC Prep: The angle the resultant makes with the larger of two forces
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