755 prompts matching "Learn: The meaning of n choose r, and how to evaluate it"
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WAEC Prep: Rationalising a denominator inside a larger expression
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Show All Working: Checking a rationalised answer by decimal approximation
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Final Revision: Expressing a rationalised answer in the form a root b over c
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Learn: Solving an equation with a single square root term
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Final Revision: A word problem that leads to an equation in surd form
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Learn: What a binary operation actually is
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Spot My Mistake: A binary operation defined on a set of three elements
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Show All Working: Evaluating a repeated operation such as a*(b*c)
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Final Revision: Deciding whether a given rule really is a binary operation
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Learn: What closure means for a binary operation
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Spot My Mistake: Reading closure off an operation table
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Show All Working: Showing a set is not closed by a single counter-example
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Final Revision: Why closure is checked before any other property
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Quiz: Reading commutativity off a symmetrical operation table
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Show All Working: An operation that is associative but not commutative
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Final Revision: Why distributivity links two operations rather than one
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Learn: What an identity element is
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Show All Working: An element with no inverse under a given operation
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Final Revision: Evaluating a numerical expression using the index laws
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Practice: A fractional index with numerator one, read as a root
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