1,045 prompts matching "The determinant of the identity matrix"
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Worked Example: Factorising a cubic into a linear and a quadratic factor
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Quiz: Factorising a polynomial by grouping terms
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Explain Back: A polynomial with a repeated linear factor
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Worked Example: How many roots a cubic equation has
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Quiz: A cubic with three distinct real roots
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Practice: A cubic with one real root and two complex ones
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Explain Back: A cubic with a repeated root
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Worked Example: Sentences that are not propositions
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Worked Example: Conjunction in a three-variable truth table
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Practice: Negation combined with a compound statement
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Spot My Mistake: Building a truth table column by column
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WAEC Prep: A truth table with three propositions in it
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Quiz: Why a conditional with a false antecedent counts as true
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WAEC Prep: Why a conditional and its contrapositive are equivalent
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Practice: What logical equivalence means
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Explain Back: Showing two statements equivalent by truth table
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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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Practice: Showing that a statement is a tautology
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