521 prompts matching "Checking a rationalised answer by decimal approximation"
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WAEC Prep: The factor theorem for a factor of the form ax plus b
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Spot My Mistake: Factorising the sum of two cubes
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WAEC Prep: Factorising the difference of two cubes
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Quiz: A cubic with three distinct real roots
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Spot My Mistake: Finding the remaining roots once one is known
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WAEC Prep: The relation between the roots and the constant term
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Quiz: The truth value of a simple proposition
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Spot My Mistake: The negation of a proposition
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WAEC Prep: The symbols used for and, or and not
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Quiz: Disjunction and the inclusive or
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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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Spot My Mistake: The contrapositive of a conditional
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WAEC Prep: Why a conditional and its contrapositive are equivalent
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Quiz: The biconditional as two conditionals taken together
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Spot My Mistake: De Morgan's laws in logic
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WAEC Prep: The double negation law
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Quiz: What a contingency is
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Spot My Mistake: The law of the excluded middle
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WAEC Prep: A tautology used to justify a rule of algebra
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