1,331 prompts matching "An element with no inverse under a given operation"
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Worked Example: Checking the solution of three equations by substitution
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Worked Example: The weight of a body as mass times g
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Practice: The parallelogram law of forces
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Practice: Choosing the most convenient pair of directions to resolve along
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Explain Back: Showing that a system of concurrent forces is in equilibrium
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Worked Example: Drawing the polygon of forces to scale
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Worked Example: The moment of a force about a point on its own line of action
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Worked Example: The total moment of three parallel forces about one end
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Explain Back: Locating the point of concurrence on a diagram
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Practice: Resolving three forces in two perpendicular directions
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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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Explain Back: Converting a value to a z-score
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Worked Example: The continuity correction when approximating a discrete distribution
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Practice: The magnitude of the sum of two vectors
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Worked Example: The position vector of the midpoint of AB
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Explain Back: The dot product of two perpendicular vectors
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Worked Example: Testing two vectors for perpendicularity
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Worked Example: Squaring a complex number
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Practice: Converting a complex number from polar form back to a plus bi
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