1,320 prompts matching "Factorising the difference of two cubes"
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Explain Back: Testing whether data are Poisson by comparing mean and variance
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WAEC Prep: Why the total area under the normal curve is one
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Quiz: The area under the normal curve, and what it represents
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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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WAEC Prep: The probability that a normal variable exceeds the mean by more than one standard deviation
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WAEC Prep: Finding the mean or the standard deviation from a given probability
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WAEC Prep: The probability that a normal variable lies below a given value
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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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Worked Example: The continuity correction when approximating a discrete distribution
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WAEC Prep: The zero vector, and what it means
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WAEC Prep: A three-dimensional vector parallel to another
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Learn: The unit vectors i, j and k
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Learn: Subtracting one vector from another
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WAEC Prep: The dot product used to find the work done by a force
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WAEC Prep: The dot product worked out from components
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WAEC Prep: Showing a triangle is right-angled using the dot product
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Practice: Deciding whether a point lies on a given line
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WAEC Prep: The resultant force on a particle given in i and j form
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