922 prompts matching "Finding a missing coefficient from a stated sum of roots"
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Practice: The direction of the resultant of several coplanar forces
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Practice: Why the forces must sum to nought in two perpendicular directions
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Quiz: The point about which the total moment of a set of forces vanishes
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Quiz: A rod resting against a wall, and the concurrence of its three forces
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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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Quiz: The standard deviation of a Poisson distribution
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Quiz: The probability in the upper tail of a normal distribution
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Quiz: Reading the wording of a question to decide which distribution applies
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Practice: The components of a vector given its magnitude and direction
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Quiz: The direction cosines of a vector in three dimensions
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Quiz: The direction of a vector as an angle with the x-axis
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Practice: The dot product as the magnitudes times the cosine of the angle
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Quiz: The vector equation of the line through two given points
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Quiz: The product of a complex number and its conjugate
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Quiz: The argument of a complex number
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Practice: The argument of a complex number in the second or third quadrant
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Practice: The addition of complex numbers shown on an Argand diagram
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Quiz: Why the power rule fails for the integral of one over x
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