861 prompts matching "Explain why a complex number times its conjugate is real"
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Show All Working: A remainder of nought, and what it means
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Learn: The statement of the factor theorem
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Quiz: Which values are worth testing as factors
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Show All Working: What the factor theorem says about the roots
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Worked Example: How many roots a cubic equation has
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Show All Working: Solving a cubic that must first be rearranged
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Learn: What makes a sentence a proposition
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Worked Example: Sentences that are not propositions
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Quiz: The truth value of a simple proposition
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Learn: How many rows a truth table needs
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Worked Example: Conjunction in a three-variable truth table
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Show All Working: Reading the final column of a truth table
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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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Learn: The biconditional, p if and only if q
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Worked Example: The truth table for the biconditional
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Quiz: The biconditional as two conditionals taken together
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Show All Working: The negation of a tautology
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Learn: What makes an argument valid
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Quiz: Modus ponens
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