706 prompts matching "A tautology used to justify a rule of algebra"
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Explain Back: Showing distributivity fails by a counter-example
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Spot My Mistake: Checking distributivity from two operation tables
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Quiz: Finding the identity element from an operation table
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Practice: Why an identity element must work from both sides
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Explain Back: What an inverse element is
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Show All Working: An element with no inverse under a given operation
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Show All Working: Simplifying an expression with letters and indices
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Quiz: A negative index on a fraction, and turning it upside down
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Spot My Mistake: A negative fractional index
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Show All Working: Simplifying an expression that mixes the index types
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Quiz: An indicial equation that becomes a quadratic in a power
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Explain Back: An indicial equation with the unknown in the exponent on both sides
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Spot My Mistake: An indicial equation involving fractional bases
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Quiz: Writing a logarithm as an index statement
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Show All Working: Solving a simple logarithmic equation
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Explain Back: A logarithmic equation written in two different bases
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Show All Working: Comparing logarithms given in different bases
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Spot My Mistake: A sequence defined by a recurrence relation
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Explain Back: Finding the first term from two given terms
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Spot My Mistake: Finding the common difference from two given terms
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