1,322 prompts matching "Simplifying the answer once the denominator is rational"
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Practice: The condition on the orders for a product to exist
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Explain Back: The order of the answer when two matrices are multiplied
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Learn: Deciding whether a stated matrix calculation is possible at all
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Spot My Mistake: Forming the determinant Dx by replacing the first column
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Spot My Mistake: Checking cofactors by expanding the determinant along a second row
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Spot My Mistake: Finding the adjoint of a 3 by 3 matrix
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Spot My Mistake: Why the inverse must be applied on the correct side
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Spot My Mistake: The greatest and the least resultant of two given forces
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Spot My Mistake: Drawing the triangle of forces to scale to find an unknown force
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Spot My Mistake: Why friction does not depend on the area of contact
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Spot My Mistake: Using concurrence to find the direction of an unknown third force
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Spot My Mistake: When Lami's theorem may be used, and when it may not
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Learn: The expectation of a discrete random variable
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Spot My Mistake: The probability of exactly r successes in n trials
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Practice: The probability of exactly r events in a Poisson distribution
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Worked Example: The probability of no events at all in a Poisson distribution
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Practice: The variance of a binomial distribution as npq
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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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Learn: The mean, median and mode of a normal distribution
You are my personal SS3 Further Mathematics tutor. Teach me the mean, median and mode of a