755 prompts matching "The focus-directrix definition shared by all the conics"
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Quiz: The law for the logarithm of a power
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Spot My Mistake: Evaluating an expression using the laws of logarithms
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Final Revision: Proving a logarithmic identity from the laws
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Learn: The change of base formula
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Spot My Mistake: A logarithm to base e, the natural logarithm
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Worked Example: Writing out the terms of a sequence from its nth term
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Quiz: Finding the nth term of a linear sequence
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Common Mistakes: The Fibonacci sequence and the rule behind it
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Final Revision: Describing a sequence in words and then in symbols
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Worked Example: Finding the common difference of an arithmetic progression
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Quiz: The formula for the nth term of an arithmetic progression
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Spot My Mistake: Finding the common difference from two given terms
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Learn: The formula for the sum of the first n terms of an arithmetic progression
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Worked Example: The alternative sum formula that uses the last term
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Quiz: The sum of the first fifty natural numbers
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Spot My Mistake: The sum of an arithmetic progression with a negative common difference
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Worked Example: Finding the common ratio of a geometric progression
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Quiz: The formula for the nth term of a geometric progression
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Spot My Mistake: Finding the common ratio when the third and sixth terms are given
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Final Revision: Deciding whether a given sequence is a geometric progression
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