1,334 prompts matching "Quiz: Why one person is fixed in a circular arrangement"
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Quiz: The zero matrix, and how it differs from nought in arithmetic
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Worked Example: A singular matrix, and why it has no inverse
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Quiz: Finding an unknown entry from a stated matrix equation
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Quiz: Expanding a 3 by 3 determinant along a row or column containing noughts
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Quiz: Arranging the equations in standard form before applying Cramer's rule
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WAEC Prep: The inverse of a 2 by 2 matrix as one over the determinant times the adjoint
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Quiz: Checking an inverse by multiplying to get the identity
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Quiz: Checking a 3 by 3 inverse by multiplication
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Quiz: Solving three simultaneous equations with the inverse matrix
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WAEC Prep: Resolving a force into horizontal and vertical components
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WAEC Prep: A table of components used to find a resultant
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WAEC Prep: Summing the components of several concurrent forces
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Explain Back: Showing that a system of concurrent forces is in equilibrium
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Explain Back: Why the total moment about any point must be nought
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Spot My Mistake: Why friction does not depend on the area of contact
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Spot My Mistake: The moment of a force whose line of action is not perpendicular
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Explain Back: The units of a moment, and why they are newton metres
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WAEC Prep: Why three non-parallel forces in equilibrium must be concurrent
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Quiz: A rod resting against a wall, and the concurrence of its three forces
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Explain Back: A probability distribution table for a discrete random variable
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