1,334 prompts matching "The sum to infinity of a geometric progression, and when it exists"
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WAEC Prep: The determinant of a 2 by 2 matrix as ad minus bc
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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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Explain Back: What a coefficient determinant of nought says about the system
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Quiz: Arranging the equations in standard form before applying Cramer's rule
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WAEC Prep: The minor of an entry of a 3 by 3 matrix
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Explain Back: Finding the adjoint of a 2 by 2 matrix quickly
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WAEC Prep: The inverse of a 2 by 2 matrix as one over the determinant times the adjoint
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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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Explain Back: The inverse of a diagonal matrix
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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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Worked Example: The weight of a body as mass times g
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WAEC Prep: The resultant of two forces acting at the same point
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Explain Back: The resultant of two forces acting in the same straight line
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WAEC Prep: The magnitude of the resultant of two forces inclined at an angle
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Worked Example: The direction of the resultant of two forces
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WAEC Prep: Resolving a force into horizontal and vertical components
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Worked Example: Marking the weight, the normal reaction and the friction on a diagram
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