755 prompts matching "Practice: Giving the roots correct to two decimal places"
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Learn: What a binary operation actually is
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Common Mistakes: A binary operation that is ordinary addition in disguise
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Learn: What closure means for a binary operation
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Common Mistakes: Closure on a set of three elements under a stated rule
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Worked Example: Testing a*b against b*a for a given rule
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Final Revision: Why brackets matter when an operation is not associative
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Explain Back: Showing distributivity fails by a counter-example
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Common Mistakes: Distributivity on a set of three elements
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Learn: What an identity element is
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Explain Back: What an inverse element is
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Worked Example: Rewriting a negative index as a fraction
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Final Revision: Converting an answer back out of index form
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Common Mistakes: An indicial equation solved by substitution
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Final Revision: Checking an indicial solution by substitution
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Worked Example: Writing an index statement as a logarithm
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Common Mistakes: Reading a logarithm from a table
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Common Mistakes: A logarithmic equation that becomes a quadratic
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Learn: What a sequence is, and what a term means
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Learn: What makes a sequence an arithmetic progression
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Common Mistakes: An arithmetic progression with a negative common difference
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