755 prompts matching "When the matrix method is worth the work for three unknowns"
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Common Mistakes: Closure on a set of three elements under a stated rule
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Explain Back: What it means for an operation to be associative
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WAEC Prep: An operation that is commutative but not associative
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Explain Back: Showing distributivity fails by a counter-example
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WAEC Prep: A rule where distributivity holds one way only
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Common Mistakes: Distributivity on a set of three elements
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Explain Back: What an inverse element is
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WAEC Prep: The inverse of the identity element itself
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WAEC Prep: Evaluating 8 to the power two-thirds
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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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Common Mistakes: Reading a logarithm from a table
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Common Mistakes: Rejecting a root that makes a logarithm undefined
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Common Mistakes: A logarithmic equation that becomes a quadratic
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Final Revision: Using change of base to prove a stated relation
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Common Mistakes: An arithmetic progression with a negative common difference
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Final Revision: Inserting an arithmetic mean between two numbers
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WAEC Prep: A word problem about seats in the rows of a hall
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Final Revision: A savings problem modelled by an arithmetic progression
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Common Mistakes: Inserting a geometric mean between two numbers
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