1,334 prompts matching "Teach me the condition two matrices must meet before they can be multiplied"
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Worked Example: Testing whether a binary operation is closed on a given set
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Common Mistakes: A binary operation defined by arithmetic modulo n
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Final Revision: Deciding whether a set under an operation forms a group
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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
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Show All Working: Expressing a number in the form a root b
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Common Mistakes: Solving an equation in which the unknown sits under a root
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Explain Back: The laws of logarithms for a product and for a quotient
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Spot My Mistake: The power law of logarithms
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WAEC Prep: The change of base formula for logarithms
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Show All Working: Solving a logarithmic equation and rejecting the invalid root
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Final Revision: Sketching the graph of a logarithmic function
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Explain Back: The range of values of k for which the roots are real
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Spot My Mistake: Forming a new equation whose roots are the reciprocals of the original
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Show All Working: Solving a quadratic by completing the square
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Practice: Finding alpha minus beta from the sum and the product
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Show All Working: Finding a coefficient given a stated relation between the roots
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Quiz: The factor theorem, and testing whether x minus a is a factor
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Explain Back: Finding an unknown coefficient given that a stated factor divides the polynomial
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Spot My Mistake: The factor theorem for a divisor of the form ax minus b
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