1,029 prompts matching "Learn: Telling a rational number from an irrational one"
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Practice: The conjunction of two propositions
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Spot My Mistake: The negation of a proposition
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Worked Example: Conjunction in a three-variable truth table
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Practice: Negation combined with a compound statement
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Spot My Mistake: Building a truth table column by column
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Worked Example: The truth table for the conditional
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Practice: The converse of a conditional
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Spot My Mistake: The contrapositive of a conditional
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Worked Example: The truth table for the biconditional
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Final Revision: A biconditional used in a mathematical definition
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Worked Example: What a contradiction is
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Practice: Showing that a statement is a tautology
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Spot My Mistake: The law of the excluded middle
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Final Revision: A longer statement tested for tautology
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Practice: Modus tollens
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Spot My Mistake: Disjunctive syllogism
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Final Revision: A word problem about seating at a round table
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Worked Example: Selections in which the order does not matter
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Final Revision: A word problem about choosing a delegation
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Worked Example: Counting the total outcomes with combinations
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