1,158 prompts matching "Find k command word: line tangent to a curve"
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Worked Example: Adding two 3 by 3 matrices
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Explain Back: Subtracting two 3 by 3 matrices
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Explain Back: Showing that AB and BA are usually different for 2 by 2 matrices
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Explain Back: Keeping track of the nine entries when multiplying 3 by 3 matrices
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Worked Example: The associative law for the product of three matrices
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Explain Back: Why the order of the letters matters in a matrix product
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Explain Back: The rule that the transpose of a product reverses the order
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Worked Example: A singular matrix, and why it has no inverse
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Explain Back: The order of the answer when two matrices are multiplied
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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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Explain Back: The determinant of a product as the product of the determinants
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Worked Example: Evaluating a 3 by 3 determinant by the rule of Sarrus
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Worked Example: Forming the determinant Dy by replacing the second column
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Explain Back: What a coefficient determinant of nought says about the system
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Worked Example: The identity that A times its adjoint gives the determinant times the identity
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Explain Back: The inverse of a diagonal matrix
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Explain Back: Solving two simultaneous equations by multiplying by the inverse
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Worked Example: Checking the solution of three equations by substitution
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Worked Example: The units of mass, and the SI unit
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