1,334 prompts matching "The sum of an arithmetic progression with a negative common difference"
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WAEC Prep: Subtracting one 2 by 2 matrix from another
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Worked Example: The associative law for the product of three matrices
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WAEC Prep: The difference between pre-multiplying and post-multiplying by a matrix
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WAEC Prep: The identity matrix, and what it does in a product
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WAEC Prep: A matrix expression with brackets to expand
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Explain Back: Solving a matrix equation containing both a sum and a product
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Worked Example: What a determinant of nought means for a 2 by 2 matrix
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WAEC Prep: Expanding a 3 by 3 determinant along the first row
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WAEC Prep: Setting out the coefficient determinant for two simultaneous equations
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Spot My Mistake: Forming the determinant Dx by replacing the first column
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Quiz: Arranging the equations in standard form before applying Cramer's rule
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Learn: Swapping and negating the entries when inverting a 2 by 2 matrix
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Quiz: Checking an inverse by multiplying to get the identity
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Practice: Why a 2 by 2 matrix with determinant nought cannot be inverted
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WAEC Prep: Checking the determinant before attempting a 3 by 3 inverse
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WAEC Prep: Simultaneous equations with fractional coefficients solved by matrix
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Practice: Comparing the inverse method with elimination for three equations
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Worked Example: Checking the solution of three equations by substitution
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WAEC Prep: The difference between a kilogram and a kilogram weight
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WAEC Prep: The newton, and how it is defined
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