1,323 prompts matching "The sum of a geometric progression with a negative common ratio"
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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
I have just studied writing out the full matrix of cofactors in my SS3 Further Mathematics
Explain Back: Finding the adjoint of a 2 by 2 matrix quickly
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Explain Back: The inverse of a diagonal matrix
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Quiz: Solving three simultaneous equations with the inverse 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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Worked Example: The units of mass, and the SI unit
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Worked Example: The weight of a body as mass times g
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Practice: The value of g used in Nigerian examination papers
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Practice: The parallelogram law of forces
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Explain Back: The resultant of two forces acting in the same straight line
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Worked Example: The direction of the resultant of two forces
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Practice: Choosing the most convenient pair of directions to resolve along
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Practice: The direction of the resultant of several coplanar forces
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Worked Example: Using the sine rule on the triangle of forces
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Practice: Why the forces must sum to nought in two perpendicular directions
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