1,334 prompts matching "Expressing a rationalised answer in the form a root b over c"
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Learn: The resultant of two perpendicular forces
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Learn: The component of a force along a stated direction
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Practice: The direction of the resultant of several coplanar forces
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Explain Back: Showing that a system of concurrent forces is in equilibrium
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Practice: Finding an unknown force from a closed polygon
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Worked Example: The total moment of three parallel forces about one end
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Learn: The algebraic sum of moments when the senses differ
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Practice: Resolving three forces in two perpendicular directions
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Explain Back: A particle hanging from two strings set at different angles
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Explain Back: A probability distribution table for a discrete random variable
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Learn: The expectation of 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 probability of at least one success
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Explain Back: Finding n and p from a given mean and variance
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Learn: Finding lambda from a stated mean
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Learn: The mean, median and mode of a normal distribution
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Explain Back: Converting a value to a z-score
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Worked Example: Finding a value from a given probability by working backwards
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Learn: The probability that a normal variable lies between two values
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