1,322 prompts matching "Learn: Forming the quadratic that decides where a line meets a curve"
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Practice: Evaluating AB minus BA
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Explain Back: Solving a matrix equation containing both a sum and a product
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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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Spot My Mistake: Checking a Cramer's rule solution by substituting back
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Practice: Why a 2 by 2 matrix with determinant nought cannot be inverted
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Quiz: Checking a 3 by 3 inverse by multiplication
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Spot My Mistake: Compounding three forces acting at one point
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Practice: Finding an unknown force from a closed polygon
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Practice: Resolving three forces in two perpendicular directions
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Explain Back: A particle hanging from two strings set at different angles
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Spot My Mistake: Finding two unknown tensions from three forces in equilibrium
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Explain Back: A probability distribution table for a discrete random variable
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Practice: Using a binomial expansion to approximate a number
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Explain Back: Finding n and p from a given mean and variance
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Explain Back: Converting a value to a z-score
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Quiz: Writing a two-dimensional vector as a column
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Practice: A vector of stated magnitude in a given direction
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Practice: Equating real and imaginary parts to find two unknowns
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Quiz: Writing a complex number in polar form
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