1,324 prompts matching "The sum of the terms lying between two given positions"
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Learn: Swapping and negating the entries when inverting a 2 by 2 matrix
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Spot My Mistake: Why the inverse must be applied on the correct side
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Practice: What a singular coefficient matrix says about the equations
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WAEC Prep: When the matrix method is worth the work for three unknowns
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Quiz: Solving three simultaneous equations with the inverse matrix
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Practice: Comparing the inverse method with elimination for three equations
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Quiz: Why mass stays the same wherever the body is taken
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WAEC Prep: The newton, and how it is defined
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WAEC Prep: Why one component vanishes when the direction is chosen well
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WAEC Prep: The forces on a body resting on a rough horizontal plane
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WAEC Prep: The forces on a body suspended by a single string
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Worked Example: Marking the weight, the normal reaction and the friction on a diagram
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Explain Back: The order in which the forces are drawn round the triangle
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WAEC Prep: The three unknowns a rigid body problem usually carries
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Explain Back: Why the total moment about any point must be nought
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Learn: Choosing the point about which to take moments
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WAEC Prep: Friction, and the direction in which it acts
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Practice: Limiting friction, and the greatest value it can reach
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WAEC Prep: The conditions for a particle under three forces to be in equilibrium
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Spot My Mistake: When Lami's theorem may be used, and when it may not
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