1,333 prompts matching "Learn: The four inequality symbols, and what each one means"
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Practice: Turning a minor into a cofactor with the sign rule
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Explain Back: Writing out the full matrix of cofactors
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WAEC Prep: The adjoint as the transpose of the matrix of cofactors
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Explain Back: Finding the adjoint of a 2 by 2 matrix quickly
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Spot My Mistake: Finding the adjoint of a 3 by 3 matrix
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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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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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Explain Back: Solving two simultaneous equations by multiplying by the inverse
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Spot My Mistake: Why the inverse must be applied on the correct side
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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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WAEC Prep: Mass, and how it differs from weight
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Quiz: Why mass stays the same wherever the body is taken
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Practice: The value of g used in Nigerian examination papers
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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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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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WAEC Prep: Resolving a force into horizontal and vertical components
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