924 prompts matching "Writing three simultaneous equations as a single matrix equation"
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Explain Back: Showing that a statement is a contradiction
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Spot My Mistake: The law of the excluded middle
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WAEC Prep: A tautology used to justify a rule of algebra
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Show All Working: The negation of a tautology
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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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Worked Example: Premises and conclusion
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Quiz: Modus ponens
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Practice: Modus tollens
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Explain Back: The rule of syllogism
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Spot My Mistake: Disjunctive syllogism
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WAEC Prep: Testing an argument for validity by truth table
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Show All Working: The fallacy of affirming the consequent
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Common Mistakes: The fallacy of denying the antecedent
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Learn: Arranging five different books on a shelf
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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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Practice: Arrangements of a word with repeated letters
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Explain Back: Arrangements restricted at the first letter
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Spot My Mistake: Arrangements with two particular items adjacent
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