1,045 prompts matching "Which form of the sum formula to use when r is less than one"
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WAEC Prep: A selection with at most a stated number of one kind
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Show All Working: Selecting a committee with the chairman named separately
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Show All Working: The binomial coefficients written as n choose r
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Common Mistakes: The link between Pascal's triangle and combinations
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Show All Working: The general term when the bracket contains a fraction
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Common Mistakes: The general term when one term in the bracket is negative
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Final Revision: A question asking for two coefficients to be equal
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IGCSE Additional Maths Y11: A composite region built from a rectangle and a sector — Common Mistakes
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IGCSE Additional Maths Y11: Giving an exact answer in terms of pi — Exam Technique
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IGCSE Additional Maths Y11: Writing tan x in terms of sin x and cos x — Worked Example
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IGCSE Additional Maths Y11: Proving an identity by turning everything into sine and cosine — Practice Set
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IGCSE Additional Maths Y11: Solving an equation within a stated range of radians — Worked Example
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IGCSE Additional Maths Y11: Evaluating sec of a given angle — Worked Example
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IGCSE Additional Maths Y11: Forming numbers greater than a stated value — Spot My Mistake
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IGCSE Additional Maths Y11: Selecting a subset of a given size — Worked Example
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IGCSE Additional Maths Y11: Equating coefficients to find an unknown constant — Common Mistakes
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IGCSE Additional Maths Y11: Adding two column vectors — Practice Set
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IGCSE Additional Maths Y11: Proving two lines parallel using vectors — Practice Set
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IGCSE Additional Maths Y11: Proving a quadrilateral is a parallelogram using vectors — Show All Working
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IGCSE Additional Maths Y11: A bearing written as a vector direction — Common Mistakes
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