1,239 prompts matching "Summarise permutations and combinations for quick revision"
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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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WAEC Prep: Setting out Cramer's rule for three simultaneous equations
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Spot My Mistake: Checking cofactors by expanding the determinant along a second row
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Learn: Swapping and negating the entries when inverting a 2 by 2 matrix
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WAEC Prep: Checking the determinant before attempting a 3 by 3 inverse
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WAEC Prep: When the matrix method is worth the work for three unknowns
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Practice: Comparing the inverse method with elimination for three equations
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Learn: Inertia, and what mass actually measures
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Learn: Converting a weight given in kilogram-force into newtons
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WAEC Prep: The resultant of two equal forces at sixty degrees
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WAEC Prep: Resolving before compounding several forces
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WAEC Prep: The resultant of two forces acting at the same point
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Practice: The parallelogram law of forces
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Spot My Mistake: Compounding three forces acting at one point
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WAEC Prep: The angle the resultant makes with the larger of two forces
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WAEC Prep: Two forces acting in opposite directions
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WAEC Prep: The magnitude of the resultant of two forces inclined at an angle
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Learn: The resultant of two perpendicular forces
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WAEC Prep: The component of a force at thirty degrees to the horizontal
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