1,334 prompts matching "The decimal expansion of an irrational number, and why it never repeats"
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Worked Example: A singular matrix, and why it has no inverse
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WAEC Prep: A matrix expression with brackets to expand
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Explain Back: Solving a matrix equation containing both a sum and a product
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Worked Example: What a determinant of nought means for a 2 by 2 matrix
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WAEC Prep: Expanding a 3 by 3 determinant down a column
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Quiz: Expanding a 3 by 3 determinant along a row or column containing noughts
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WAEC Prep: Setting out the coefficient determinant for two simultaneous equations
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Spot My Mistake: Forming the determinant Dx by replacing the first column
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Quiz: Checking an inverse by multiplying to get the identity
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WAEC Prep: Checking the determinant before attempting a 3 by 3 inverse
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Quiz: Solving three simultaneous equations with the inverse matrix
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Worked Example: Checking the solution of three equations by substitution
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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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Worked Example: The weight of a body as mass times g
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WAEC Prep: Why one component vanishes when the direction is chosen well
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WAEC Prep: Resolving a force into horizontal and vertical components
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WAEC Prep: The forces on a body resting on a rough horizontal plane
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Learn: A space diagram and a force diagram drawn side by side
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Worked Example: Drawing the polygon of forces to scale
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