1,333 prompts matching "Laws of indices with three different bases in one line"
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Worked Example: Taking a common factor out of a matrix
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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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Explain Back: The order of the answer when two matrices are multiplied
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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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Practice: The sign pattern of the cofactors in a 3 by 3 determinant
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Worked Example: Evaluating a 3 by 3 determinant by the rule of Sarrus
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Explain Back: What a coefficient determinant of nought says about the system
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Explain Back: Writing out the full matrix of cofactors
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Explain Back: Finding the adjoint of a 2 by 2 matrix quickly
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Practice: Why a 2 by 2 matrix with determinant nought cannot be inverted
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Explain Back: The inverse of a diagonal matrix
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Practice: The value of g used in Nigerian examination papers
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Explain Back: The resultant of two forces acting in the same straight line
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Practice: Choosing the most convenient pair of directions to resolve along
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Explain Back: Showing that a system of concurrent forces is in equilibrium
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Worked Example: Using the sine rule on the triangle of forces
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Worked Example: Drawing the polygon of forces to scale
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Worked Example: The moment of a force about a point on its own line of action
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