998 prompts matching "Deciding whether a given sequence is a geometric progression"
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Learn: The distributive law for a scalar over a sum of matrices
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Spot My Mistake: Orders that make a product possible one way round but not the other
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Spot My Mistake: A symmetric matrix, equal to its own transpose
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Practice: The condition on the orders for a product to exist
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WAEC Prep: When Cramer's rule is quicker than elimination
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Spot My Mistake: Forming the determinant Dx by replacing the first column
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WAEC Prep: What Cramer's rule gives when the system is inconsistent
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Spot My Mistake: Checking a Cramer's rule solution by substituting back
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Spot My Mistake: Checking cofactors by expanding the determinant along a second row
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Spot My Mistake: Finding the adjoint of a 3 by 3 matrix
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Spot My Mistake: Why the inverse must be applied on the correct side
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WAEC Prep: A three-unknown system arising from a word problem
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WAEC Prep: When the matrix method is worth the work for three unknowns
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Quiz: Why mass stays the same wherever the body is taken
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WAEC Prep: The newton, and how it is defined
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Spot My Mistake: Compounding three forces acting at one point
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WAEC Prep: Why one component vanishes when the direction is chosen well
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Spot My Mistake: Drawing the triangle of forces to scale to find an unknown force
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WAEC Prep: Why friction is called a self-adjusting force
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Spot My Mistake: Why friction does not depend on the area of contact
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