1,283 prompts matching "Union and intersection of two number sets"
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Learn: Swapping and negating the entries when inverting a 2 by 2 matrix
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Explain Back: The inverse of a diagonal matrix
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Explain Back: Solving two simultaneous equations by multiplying by the inverse
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Worked Example: Checking the solution of three equations by substitution
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WAEC Prep: A particle, and what the word assumes
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WAEC Prep: A rigid body, and what the word assumes
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WAEC Prep: Mass, and how it differs from weight
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Learn: Inertia, and what mass actually measures
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WAEC Prep: The difference between a kilogram and a kilogram weight
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WAEC Prep: The newton, and how it is defined
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Worked Example: The weight of a body as mass times g
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WAEC Prep: Resolving a force into horizontal and vertical components
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Explain Back: Showing that a system of concurrent forces is in equilibrium
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Worked Example: Marking the weight, the normal reaction and the friction on a diagram
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Learn: A space diagram and a force diagram drawn side by side
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Explain Back: The forces acting on a body hanging from two strings
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Worked Example: Using the sine rule on the triangle of forces
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Worked Example: Drawing the polygon of forces to scale
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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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