755 prompts matching "The minor of an entry of a 3 by 3 matrix"
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Practice: Rationalising a denominator with a whole number multiplying the surd
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Spot My Mistake: Simplifying the denominator once the conjugate has been used
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Quiz: Checking a surd equation for extraneous roots
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Practice: Solving an equation with a surd on each side
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Worked Example: Reading the symbol used for a binary operation
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Worked Example: Testing the even numbers for closure under addition
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Quiz: Testing the odd numbers for closure under addition
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Practice: An operation that is not commutative, with a counter-example
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Explain Back: What it means for an operation to be associative
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WAEC Prep: An operation that is commutative but not associative
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Worked Example: Testing whether star distributes over plus
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Quiz: Left distributivity and right distributivity
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Explain Back: Showing distributivity fails by a counter-example
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Worked Example: Finding the identity element from a rule such as a*b = a + b - 3
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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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Spot My Mistake: The law for a quotient raised to a power
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Quiz: A negative index on a fraction, and turning it upside down
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WAEC Prep: Evaluating 8 to the power two-thirds
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Worked Example: Solving an indicial equation where one side must be factorised first
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