1,331 prompts matching "An element with no inverse under a given operation"
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WAEC Further Mathematics: vectors and geometry combined question
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Quiz: The complement of a set within a stated universal set
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Spot My Mistake: De Morgan's law that the complement of a union is the intersection of the complements
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Practice: Testing a binary operation for associativity
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Common Mistakes: A binary operation defined by arithmetic modulo n
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Quiz: Multiplying two surds and simplifying the result
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Practice: Rationalising a denominator of the form root a
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Explain Back: Rationalising a denominator of the form a plus root b using the conjugate
I have just studied rationalising a denominator of the form a plus root b using the conjug
WAEC Prep: Comparing the sizes of two surds without a calculator
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Quiz: Solving an index equation by writing both sides to the same base
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Explain Back: The laws of logarithms for a product and for a quotient
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WAEC Prep: The change of base formula for logarithms
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Explain Back: The range of values of k for which the roots are real
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WAEC Prep: Forming an equation whose roots are each two more than the original
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Spot My Mistake: Forming an equation whose roots are alpha squared and beta squared
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WAEC Prep: Forming an equation whose roots are alpha over beta and beta over alpha
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Show All Working: Finding a coefficient given a stated relation between the roots
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Final Revision: Checking a symmetric-function answer by solving the equation outright
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Worked Example: Evaluating a polynomial by substitution
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Quiz: The factor theorem, and testing whether x minus a is a factor
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