1,324 prompts matching "determine whether the argument 'if p then q; p; therefore q' is valid using a tr"
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Worked Example: The associative law for the product of three matrices
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Quiz: Solving AX equals B and XA equals B by different routes
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Practice: The transpose of a 2 by 3 matrix
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Learn: The effect on a determinant of swapping two rows
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Practice: The sign pattern of the cofactors in a 3 by 3 determinant
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Worked Example: Evaluating a 3 by 3 determinant by the rule of Sarrus
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Worked Example: Forming the determinant Dy by replacing the second column
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Practice: Turning a minor into a cofactor with the sign rule
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Worked Example: The identity that A times its adjoint gives the determinant times the identity
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Learn: Swapping and negating the entries when inverting a 2 by 2 matrix
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Learn: The order of the steps in inverting a 3 by 3 matrix
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Practice: What a singular coefficient matrix says about the equations
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Practice: Comparing the inverse method with elimination for three equations
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Worked Example: Checking the solution of three equations by substitution
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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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Practice: The value of g used in Nigerian examination papers
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Practice: The parallelogram law of forces
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Worked Example: The direction of the resultant of two forces
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Learn: The resultant of two perpendicular forces
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