1,017 prompts matching "Deciding whether a set under an operation forms a group"
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Worked Example: Testing a list of candidates to find a factor
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Final Revision: A factor theorem question set in the WAEC style
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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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Common Mistakes: Factorising fully, and knowing when to stop
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Worked Example: How many roots a cubic equation has
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WAEC Prep: The relation between the roots and the constant term
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Show All Working: Solving a cubic that must first be rearranged
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WAEC Prep: The symbols used for and, or and not
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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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WAEC Prep: Why a conditional and its contrapositive are equivalent
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Show All Working: Why a conditional and its converse are not equivalent
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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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Worked Example: Premises and conclusion
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WAEC Prep: Testing an argument for validity by truth table
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Common Mistakes: The fallacy of denying the antecedent
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Worked Example: Arranging r of n objects in a line
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Spot My Mistake: Arrangements with two particular items adjacent
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