1,334 prompts matching "Quiz me on the using the discriminant to describe the roots"
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Practice: Choosing the most convenient pair of directions to resolve along
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WAEC Prep: The two conditions for a rigid body to be in equilibrium
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Practice: Why the forces must sum to nought in two perpendicular directions
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Explain Back: Why the total moment about any point must be nought
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Learn: Choosing the point about which to take moments
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Worked Example: Drawing the polygon of forces to scale
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Spot My Mistake: The moment of a force whose line of action is not perpendicular
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Worked Example: The moment of a force about a point on its own line of action
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WAEC Prep: The resultant moment of a couple and a force together
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WAEC Prep: The total moment of two forces about the same point
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WAEC Prep: The triangle of forces and concurrence taken together
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WAEC Prep: The conditions for a particle under three forces to be in equilibrium
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Spot My Mistake: Why the probabilities in a distribution must sum to one
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WAEC Prep: The binomial expansion of a plus b all to the power n
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WAEC Prep: Comparing the mean with the variance 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: Why the total area under the normal curve is one
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Learn: The mean, median and mode of a normal distribution
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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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