755 prompts matching "When the matrix method is worth the work for three unknowns"
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Quiz: Testing the odd numbers for closure under addition
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Worked Example: Testing a*b against b*a for a given rule
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Final Revision: Why distributivity links two operations rather than one
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Worked Example: Finding the identity element from a rule such as a*b = a + b - 3
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Quiz: The law for dividing powers of the same base
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Learn: Why any non-zero number to the power nought is one
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Common Mistakes: Writing a root as a fractional index before simplifying
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Final Revision: Converting an answer back out of index form
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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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Quiz: The law for the logarithm of a power
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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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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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Learn: The formula for the sum of the first n terms of an arithmetic progression
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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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Final Revision: Deciding whether a given sequence is 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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