1,034 prompts matching "Showing a set is not closed by a single counter-example"
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Worked Example: The number of arrangements of n different objects in a row
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Worked Example: The difference between a permutation and a combination
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Worked Example: The identities for one plus tan squared and one plus cot squared
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Worked Example: Solving cos x equals a negative value, and finding both solutions
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Worked Example: The shape, period and range of the cosine curve
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Worked Example: The midpoint formula applied to a given segment
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Worked Example: The equation of a circle with a given centre and radius
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Worked Example: The parametric form of a point on a parabola
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Worked Example: Relative velocity when two bodies move along the same line
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Worked Example: The common acceleration of two connected particles
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Worked Example: The normal reaction on a body resting on a smooth incline
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Worked Example: The acceleration of a body moving round a circle at constant speed
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Worked Example: The amplitude, period and frequency of a simple harmonic motion
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Worked Example: The tension in a stretched elastic string
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