916 prompts matching "De Morgan's laws for sets"
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Spot My Mistake: Finding the adjoint of a 3 by 3 matrix
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Quiz: Checking a 3 by 3 inverse by multiplication
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Practice: What a singular coefficient matrix says about the equations
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Quiz: Solving three simultaneous equations with the inverse matrix
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Quiz: Why mass stays the same wherever the body is taken
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Practice: The value of g used in Nigerian examination papers
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Practice: Choosing the most convenient pair of directions to resolve along
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Quiz: The coefficient of friction between two surfaces
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Practice: Limiting friction, and the greatest value it can reach
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Spot My Mistake: When Lami's theorem may be used, and when it may not
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Spot My Mistake: Why the probabilities in a distribution must sum to one
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Practice: Using a binomial expansion to approximate a number
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Spot My Mistake: The probability of exactly r successes in n trials
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Practice: The probability of at least one success
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Practice: The probability of exactly r events in a Poisson distribution
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Practice: The variance of a binomial distribution as npq
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Spot My Mistake: Reading a probability from the standard normal table
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Quiz: The probability in the upper tail of a normal distribution
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Practice: Using the normal tables when the z-score is negative
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Spot My Mistake: When the normal distribution may approximate the binomial
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