1,334 prompts matching "Multiplying and dividing indices in one expression"
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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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Learn: Swapping and negating the entries when inverting a 2 by 2 matrix
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Explain Back: Solving two simultaneous equations by multiplying by the inverse
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Learn: Inertia, and what mass actually measures
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Spot My Mistake: Compounding three forces acting at one point
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Quiz: Recovering the original force from its two components
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WAEC Prep: A table of components used to find a resultant
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WAEC Prep: Summing the components of several concurrent forces
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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 units of a moment, and why they are newton metres
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Quiz: A rod resting against a wall, and the concurrence of its three forces
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Explain Back: A probability distribution table for a discrete random variable
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Spot My Mistake: Why the probabilities in a distribution must sum to one
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WAEC Prep: The probabilities of nought, one and two successes read off an expansion
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WAEC Prep: The probability of at least one event in a Poisson distribution
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Explain Back: Finding n and p from a given mean and variance
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Learn: The standard deviation of a binomial distribution
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Explain Back: Testing whether data are Poisson by comparing mean and variance
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WAEC Prep: The standard normal distribution, with mean nought and variance one
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Spot My Mistake: Reading a probability from the standard normal table
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