992 prompts matching "Explaining why sum to infinity only works for |r| < 1"
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Worked example: how many distinct arrangements are there of the letters in the word MISSISSIPPI
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Worked example: in how many ways can 6 people be seated around a circular table
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Worked Example: Halving the coefficient of x and squaring it
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Worked Example: The product of the roots as c over a
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Spot My Mistake: A pair with equal roots, meaning one solution only
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Worked Example: The degree of a polynomial in one variable
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Worked Example: The remainder on dividing by x minus 3
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Worked Example: How many roots a cubic equation has
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Worked Example: Sentences that are not propositions
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Worked Example: Conjunction in a three-variable truth table
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Worked Example: What a contradiction is
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Worked Example: Premises and conclusion
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Worked Example: Arranging r of n objects in a line
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Worked Example: The number of ways n people sit round a round table
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Worked Example: Selections in which the order does not matter
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Worked Example: Reading the coefficients of an expansion off Pascal's triangle
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Worked Example: Finding the fifth term of an expansion
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Teach me quadratic trinomial factorisation
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Teach me solving quadratic equations by factorisation
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Derive the quadratic formula
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