351 prompts matching "A probability found by counting arrangements"
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Show All Working: Expressing a number in the form a root b
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Spot My Mistake: The power law of logarithms
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Show All Working: Solving a logarithmic equation and rejecting the invalid root
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Spot My Mistake: Forming a new equation whose roots are the reciprocals of the original
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Spot My Mistake: Forming an equation whose roots are alpha squared and beta squared
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Show All Working: Finding a coefficient given a stated relation between the roots
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Spot My Mistake: The factor theorem for a divisor of the form ax minus b
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Spot My Mistake: The relations between roots and coefficients for a quartic
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Show All Working: Three roots in arithmetic progression in a cubic
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Spot My Mistake: Showing the solution of an inequality on a number line
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Show All Working: Solving a pair of simultaneous linear inequalities
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Spot My Mistake: The identity that n choose r equals n choose n minus r
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Spot My Mistake: The double angle formula for sine
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Show All Working: The half angle formulae and the t-substitution
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Spot My Mistake: The effect of c in y equals sin x plus c
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Show All Working: Reading the solutions of a trigonometric equation off a graph
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Show All Working: Proving two given lines perpendicular from their gradients
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Spot My Mistake: The equation of the tangent to a circle at a point on it
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Show All Working: The intersection of a circle and a straight line
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Spot My Mistake: The foci of an ellipse
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