674 prompts matching "Expanding cos of 3 theta using de Moivre's theorem"
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Explain Back: A fractional index with a numerator above one
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Spot My Mistake: A negative fractional index
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Worked Example: Solving an indicial equation where one side must be factorised first
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Explain Back: An indicial equation with the unknown in the exponent on both sides
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Worked Example: Writing an index statement as a logarithm
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Quiz: Writing a logarithm as an index statement
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WAEC Prep: Why the logarithm of a negative number does not exist
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Final Revision: The characteristic and the mantissa of a logarithm
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Learn: The law for the logarithm of a product
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Worked Example: The law for the logarithm of a quotient
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Learn: The change of base formula
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Worked Example: Writing out the terms of a sequence from its nth term
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Spot My Mistake: A sequence defined by a recurrence relation
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Worked Example: Finding the common difference of an arithmetic progression
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Learn: The formula for the sum of the first n terms of an arithmetic progression
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WAEC Prep: A word problem about seats in the rows of a hall
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Show All Working: The sum of the terms lying between two given positions
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Worked Example: Finding the common ratio of a geometric progression
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Learn: The formula for the sum of the first n terms of a geometric progression
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Worked Example: Which form of the sum formula to use when r is less than one
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