1,301 prompts matching "An arithmetic progression with a negative common difference"
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Worked Example: Using the sine rule on the triangle of forces
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Explain Back: The order in which the forces are drawn round the triangle
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Explain Back: Why the total moment about any point must be nought
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Practice: Finding an unknown force from a closed polygon
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Practice: Limiting friction, and the greatest value it can reach
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Explain Back: The units of a moment, and why they are newton metres
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Explain Back: A particle hanging from two strings set at different angles
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Worked Example: Matching each force to the sine of the angle opposite it
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Explain Back: A probability distribution table for a discrete random variable
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Worked Example: Finding a particular term of a binomial expansion
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Practice: Using a binomial expansion to approximate a number
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Practice: The variance of a binomial distribution as npq
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Explain Back: Finding n and p from a given mean and variance
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Explain Back: Testing whether data are Poisson by comparing mean and variance
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Practice: The components of a vector given its magnitude and direction
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Worked Example: The distance between two points in three dimensions
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Worked Example: The triangle law of vector addition
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Practice: The dot product as the magnitudes times the cosine of the angle
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Explain Back: The resultant of forces given as vectors
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Worked Example: The powers of i, and the cycle they follow
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