1,334 prompts matching "Practice: Solving an equation with a surd on each side"
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Quiz: Expanding a 3 by 3 determinant along a row or column containing noughts
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Practice: The sign pattern of the cofactors in a 3 by 3 determinant
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Spot My Mistake: Checking cofactors by expanding the determinant along a second row
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WAEC Prep: The inverse of a 2 by 2 matrix as one over the determinant times the adjoint
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Worked Example: Checking the solution of three equations by substitution
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WAEC Prep: The newton, and how it is defined
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Practice: Choosing the most convenient pair of directions to resolve along
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Practice: Why the forces must sum to nought in two perpendicular directions
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WAEC Prep: Friction, and the direction in which it acts
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Spot My Mistake: Using concurrence to find the direction of an unknown third force
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Quiz: A rod resting against a wall, and the concurrence of its three forces
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Worked Example: Matching each force to the sine of the angle opposite it
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WAEC Prep: The binomial expansion of a plus b all to the power n
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Practice: The probability of at least one success
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WAEC Prep: The Poisson formula, and what lambda stands for
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Practice: The probability of exactly r events in a Poisson distribution
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WAEC Prep: The mean of a binomial distribution as np
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WAEC Prep: Why the mean and the variance of a Poisson distribution are equal
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Quiz: The standard deviation of a Poisson distribution
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WAEC Prep: Choosing between a binomial and a Poisson model
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