1,332 prompts matching "Arranging objects when some must stay in a fixed order"
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Quiz: Forming a quadratic equation whose roots are given
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Spot My Mistake: Forming a new equation whose roots are the reciprocals of the original
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Quiz: Finding alpha cubed plus beta cubed
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Spot My Mistake: Forming an equation whose roots are alpha squared and beta squared
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Quiz: The factor theorem, and testing whether x minus a is a factor
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Spot My Mistake: The factor theorem for a divisor of the form ax minus b
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Quiz: Solving a quadratic inequality using a sign table
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Spot My Mistake: Showing the solution of an inequality on a number line
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Common Mistakes: The range of values of x for which an expression stays positive
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WAEC Prep: Circular permutations of n objects round a table
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Quiz: Choosing a committee of r people from n
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Spot My Mistake: The identity that n choose r equals n choose n minus r
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Quiz: The compound angle formula for sine of A plus B
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Spot My Mistake: The double angle formula for sine
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Quiz: Solving tan x equals a given value, and the period of the tangent
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Spot My Mistake: Solving an equation by first applying a Pythagorean identity
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Spot My Mistake: The effect of c in y equals sin x plus c
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Quiz: The gradient of the line through two points
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Quiz: Finding the centre and the radius from the general equation
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Spot My Mistake: The equation of the tangent to a circle at a point on it
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