1,316 prompts matching "The alternative sum formula that uses the last term"
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Common Mistakes: A binary operation defined by arithmetic modulo n
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Common Mistakes: Solving an exponential equation using logarithms
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Final Revision: Solving a disguised quadratic by substitution
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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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Show All Working: Three roots in arithmetic progression in a cubic
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Common Mistakes: Three roots in geometric progression in a cubic
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Show All Working: Solving a pair of simultaneous linear inequalities
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Common Mistakes: Selections in which at least one of a kind must appear
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Final Revision: Proving an identity by working on one side only
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Final Revision: Losing solutions by dividing through by cos x
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Common Mistakes: Identifying a conic from a general second-degree equation
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Show All Working: Replacing two parallel forces by a single resultant
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Show All Working: A mass on a spring performing simple harmonic motion
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Simplifying an expression before solving an equation
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Inequality word problem with a real-life constraint
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Factorising an expression with a common algebraic bracket factor
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Solving an equation formed by equating two algebraic fractions
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What a function is and function notation
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Evaluating a function at a given value
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