1,045 prompts matching "The range of values of k for which the roots are real"
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Final Revision: Checking a factorisation by expanding it again
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Common Mistakes: A cubic equation arising from a volume problem
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Common Mistakes: Translating a symbolic statement back into English
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Final Revision: A compound proposition built from three simple ones
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Worked Example: Conjunction in a three-variable truth table
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Spot My Mistake: Building a truth table column by column
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Quiz: Why a conditional with a false antecedent counts as true
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Final Revision: A conditional statement set in an everyday situation
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Spot My Mistake: De Morgan's laws in logic
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Worked Example: What a contradiction is
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Quiz: What a contingency is
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Common Mistakes: Deciding between tautology, contradiction and contingency
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Worked Example: Premises and conclusion
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Quiz: Modus ponens
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Spot My Mistake: Disjunctive syllogism
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Common Mistakes: Arranging objects when some must stay in a fixed order
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Final Revision: A word problem about seating at a round table
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Final Revision: A word problem about choosing a delegation
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Final Revision: A word problem about a lottery draw
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Spot My Mistake: Expanding a bracket with a minus sign inside it
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