1,333 prompts matching "IGCSE Additional Maths Y11: Giving an answer to the accuracy the paper asks for"
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Worked Example: Taking a common factor out of a matrix
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WAEC Prep: The difference between pre-multiplying and post-multiplying by a matrix
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Practice: The transpose of a 2 by 3 matrix
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Explain Back: The rule that the transpose of a product reverses the order
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WAEC Prep: The identity matrix, and what it does in a product
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Worked Example: A singular matrix, and why it has no inverse
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Practice: The condition on the orders for a product to exist
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Explain Back: Solving a matrix equation containing both a sum and a product
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WAEC Prep: The determinant of a 2 by 2 matrix as ad minus bc
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Worked Example: What a determinant of nought means for a 2 by 2 matrix
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Learn: The effect on a determinant of swapping two rows
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Explain Back: The determinant of a product as the product of the determinants
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WAEC Prep: Expanding a 3 by 3 determinant along the first row
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Worked Example: Evaluating a 3 by 3 determinant by the rule of Sarrus
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WAEC Prep: Setting out the coefficient determinant for two simultaneous equations
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Worked Example: Forming the determinant Dy by replacing the second column
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Learn: Solving two simultaneous equations by Cramer's rule
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WAEC Prep: Setting out Cramer's rule for three simultaneous equations
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Explain Back: What a coefficient determinant of nought says about the system
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WAEC Prep: The minor of an entry of a 3 by 3 matrix
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