1,213 prompts matching "IGCSE Additional Maths Y10: Deciding whether a relation is a function — IGCSE Ex"
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Common Mistakes: A binary operation defined by arithmetic modulo n
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Practice: Rationalising a denominator of the form root a
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Spot My Mistake: Squaring a bracket that contains a surd
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Common Mistakes: Solving an equation in which the unknown sits under a root
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Final Revision: Proving that root 2 is irrational
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Learn: The multiplication and division laws of indices used together
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Spot My Mistake: The power law of logarithms
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Common Mistakes: Solving an exponential equation using logarithms
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Worked Example: The discriminant, and what each of its three cases means
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Spot My Mistake: Forming a new equation whose roots are the reciprocals of the original
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Common Mistakes: Proving that a quadratic expression is positive for every real x
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Final Revision: Solving a disguised quadratic by substitution
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Spot My Mistake: Forming an equation whose roots are alpha squared and beta squared
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Common Mistakes: Symmetric functions when the three roots of a cubic are involved
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Practice: Factorising a cubic completely once one factor is known
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WAEC Prep: Sketching a cubic from its factorised form
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Show All Working: Solving a cubic equation by factorisation
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Common Mistakes: Adding, subtracting and multiplying two polynomials
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Final Revision: The zeros of a polynomial and where its graph cuts the x-axis
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Common Mistakes: Three roots in geometric progression in a cubic
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