1,045 prompts matching "Finding the inverse of an element under a binary operation"
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Common Mistakes: Simplifying a compound statement using the laws
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Final Revision: A biconditional used in a mathematical definition
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WAEC Prep: A tautology used to justify a rule of algebra
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Common Mistakes: Deciding between tautology, contradiction and contingency
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Learn: What makes an argument valid
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Final Revision: An argument written in words and tested for validity
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Learn: Arranging five different books on a shelf
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Common Mistakes: Arranging objects when some must stay in a fixed order
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Explain Back: Circular arrangements with two people kept apart
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Common Mistakes: Comparing a line arrangement with a circular one
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Learn: Selecting a team of five from a squad
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Spot My Mistake: A selection with at least a stated number of one kind
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WAEC Prep: A selection with at most a stated number of one kind
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Explain Back: Probability with replacement and without replacement
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Show All Working: The complement rule used in a counting problem
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Common Mistakes: A probability found by counting arrangements
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Learn: Building Pascal's triangle row by row
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Show All Working: The binomial coefficients written as n choose r
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Show All Working: The general term when the bracket contains a fraction
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Common Mistakes: The general term when one term in the bracket is negative
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