1,025 prompts matching "Practice: Using a table of signs to solve a quadratic inequality"
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Common Mistakes: Translating a symbolic statement back into English
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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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Explain Back: The truth table for a statement with two connectives
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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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Explain Back: The inverse of a conditional
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Spot My Mistake: The contrapositive of a conditional
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Common Mistakes: Writing the converse, inverse and contrapositive of one statement
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Worked Example: The truth table for the biconditional
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Practice: What logical equivalence means
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Explain Back: Showing two statements equivalent by truth table
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Learn: What a tautology is
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Spot My Mistake: The law of the excluded middle
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Common Mistakes: Deciding between tautology, contradiction and contingency
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Final Revision: A longer statement tested for tautology
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Explain Back: The rule of syllogism
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Common Mistakes: The fallacy of denying the antecedent
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Worked Example: Arranging r of n objects in a line
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Quiz: Arrangements of a word with no repeated letters
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