1,333 prompts matching "Checking an inverse by working the operation both ways"
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WAEC Prep: Adding two 2 by 2 matrices entry by entry
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Worked Example: Adding two 3 by 3 matrices
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WAEC Prep: Multiplying two 2 by 2 matrices, row into column
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Spot My Mistake: Squaring a 2 by 2 matrix
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WAEC Prep: Multiplying two 3 by 3 matrices, row into column
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Spot My Mistake: Multiplying a 3 by 3 matrix by a 3 by 1 column
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WAEC Prep: Multiplying a matrix by a fraction
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WAEC Prep: Multiplying every entry of a matrix by a scalar
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Learn: The distributive law for a scalar over a sum of matrices
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Quiz: Multiplying a matrix by minus one
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WAEC Prep: Pre-multiplying a column vector by a matrix
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WAEC Prep: Post-multiplying a row vector by a matrix
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Practice: The condition on the orders for a product to exist
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Learn: Deciding whether a stated matrix calculation is possible at all
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Practice: Turning a minor into a cofactor with the sign rule
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Practice: What a singular coefficient matrix says about the equations
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Learn: Inertia, and what mass actually measures
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Practice: The parallelogram law of forces
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Learn: The component of a force along a stated direction
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Practice: Choosing the most convenient pair of directions to resolve along
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