663 prompts matching "Testing whether a relation is a function"
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Common Mistakes: Factorising fully, and knowing when to stop
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Final Revision: Checking a factorisation by expanding it again
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Learn: Solving a cubic once it has been factorised
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Quiz: A cubic with three distinct real roots
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Common Mistakes: A cubic equation arising from a volume problem
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Spot My Mistake: The negation of a proposition
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Show All Working: Translating an English sentence into logical symbols
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Common Mistakes: Translating a symbolic statement back into English
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Quiz: Disjunction and the inclusive or
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Spot My Mistake: Building a truth table column by column
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Common Mistakes: Comparing two statements by their truth tables
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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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Spot My Mistake: De Morgan's laws in logic
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Show All Working: The distributive laws in logic
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Common Mistakes: Simplifying a compound statement using the laws
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Learn: What a tautology is
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Worked Example: What a contradiction is
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Quiz: What a contingency is
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Practice: Showing that a statement is a tautology
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