1,045 prompts matching "Restricting the domain so an inverse exists"
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Common Mistakes: Factorising fully, and knowing when to stop
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Learn: Solving a cubic once it has been factorised
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Worked Example: How many roots a cubic equation has
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Common Mistakes: Translating a symbolic statement back into English
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Learn: How many rows a truth table needs
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Common Mistakes: Comparing two statements by their truth tables
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Learn: The conditional statement, if p then q
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Worked Example: The truth table for the conditional
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Worked Example: The truth table for the biconditional
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Common Mistakes: Simplifying a compound statement using the laws
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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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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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Worked Example: The number of ways n people sit round a round table
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Common Mistakes: Comparing a line arrangement with a circular one
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Worked Example: Selections in which the order does not matter
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Common Mistakes: The number of ways of dividing a class into groups
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Worked Example: Counting the total outcomes with combinations
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