1,319 prompts matching "Practice: Deciding whether root 16 is rational or irrational"
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Spot My Mistake: Orders that make a product possible one way round but not the other
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Practice: The sign pattern of the cofactors in a 3 by 3 determinant
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Spot My Mistake: Forming the determinant Dx by replacing the first column
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Practice: Turning a minor into a cofactor with the sign rule
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Spot My Mistake: Checking cofactors by expanding the determinant along a second row
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Spot My Mistake: Why the inverse must be applied on the correct side
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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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Practice: Comparing the inverse method with elimination for three equations
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Practice: The parallelogram law of forces
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Spot My Mistake: Compounding three forces acting at one point
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Spot My Mistake: The greatest and the least resultant of two given forces
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Practice: The direction of the resultant of several coplanar forces
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Spot My Mistake: Drawing the triangle of forces to scale to find an unknown force
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Practice: Why the forces must sum to nought in two perpendicular directions
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Practice: Finding an unknown force from a closed polygon
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WAEC Prep: Why friction is called a self-adjusting force
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WAEC Prep: Calculating a moment as force times perpendicular distance
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Quiz: The point about which the total moment of a set of forces vanishes
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Spot My Mistake: Using concurrence to find the direction of an unknown third force
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