1,334 prompts matching "Number of elements in a set from a Venn diagram region count"
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Quiz: The factor theorem, and testing whether x minus a is a factor
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Practice: Factorising a cubic completely once one factor is known
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Final Revision: Checking that the roots found satisfy the original equation
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Worked Example: Solving a quadratic inequality by sketching the parabola
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Quiz: Solving a quadratic inequality using a sign table
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Practice: Solving an inequality with the unknown in the denominator
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Worked Example: The difference between a permutation and a combination
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Practice: Choosing a committee that must contain one particular person
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Final Revision: Combinations used with the addition and multiplication principles
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Final Revision: Proving an identity by working on one side only
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Worked Example: Solving cos x equals a negative value, and finding both solutions
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WAEC Prep: Solving an equation by first applying a double angle formula
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Final Revision: Losing solutions by dividing through by cos x
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Worked Example: The midpoint formula applied to a given segment
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Practice: The ellipse in standard form, and its two axes
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Spot My Mistake: The foci of an ellipse
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WAEC Prep: The hyperbola in standard form, and its asymptotes
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Final Revision: The focus-directrix definition shared by all the conics
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Learn: The range, and why it is a weak measure of spread
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Quiz: The semi-interquartile range
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