1,034 prompts matching "Showing a set is not closed by a single counter-example"
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Worked Example: Solving a quadratic inequality by sketching the parabola
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Common Mistakes: The range of values of x for which an expression stays positive
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Common Mistakes: Arrangements restricted at the first or the last place
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Common Mistakes: Selections in which at least one of a kind must appear
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Common Mistakes: Expressing a cos x plus b sin x in the form R cos of x minus alpha
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Common Mistakes: Giving the general solution of a trigonometric equation
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Common Mistakes: Sketching two trigonometric curves on the same axes to find where they meet
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Learn: The distance between two points
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Common Mistakes: The angle between two lines found from their gradients
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Common Mistakes: The condition for a line to be a tangent to a circle
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Common Mistakes: Identifying a conic from a general second-degree equation
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Learn: The range, and why it is a weak measure of spread
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Worked Example: The sign convention for clockwise and anticlockwise moments
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WAEC Prep: A couple, and why its moment is the same about every point
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Common Mistakes: The centre of gravity of a uniform lamina
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Learn: The velocity of one body relative to another
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Common Mistakes: The relative displacement of two bodies after a given time
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Common Mistakes: What becomes of the tension when the string goes slack
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Common Mistakes: The work done against friction on an incline
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Common Mistakes: The condition for a body to complete a vertical circle
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