755 prompts matching "Checking the determinant before attempting a 3 by 3 inverse"
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WAEC Prep: Writing a binary operation rule from a description in words
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Common Mistakes: A binary operation that is ordinary addition in disguise
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Practice: Testing a set for closure under multiplication
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Spot My Mistake: Reading closure off an operation table
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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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Practice: An operation that is not commutative, with a counter-example
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Explain Back: What it means for an operation to be associative
I have just studied what it means for an operation to be associative in my SS1 Further Mat
Spot My Mistake: Testing (a*b)*c against a*(b*c)
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WAEC Prep: An operation that is commutative but not associative
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Final Revision: Why brackets matter when an operation is not associative
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Practice: Multiplication distributing over addition in ordinary arithmetic
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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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Practice: Why an identity element must work from both sides
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WAEC Prep: Applying two index laws inside one expression
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Worked Example: Rewriting a negative index as a fraction
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Practice: A fractional index with numerator one, read as a root
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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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