624 prompts matching "Subtracting one 2 by 2 matrix from another"
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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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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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Show All Working: The negation of a tautology
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Final Revision: A longer statement tested for tautology
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Worked Example: Premises and conclusion
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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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Show All Working: The fallacy of affirming the consequent
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Final Revision: An argument written in words and tested for validity
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Worked Example: Arranging r of n objects in a line
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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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Show All Working: Arrangements of boys and girls alternately
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Final Revision: Counting the arrangements of people in a queue
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Worked Example: The number of ways n people sit round a round table
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