1,334 prompts matching "The sum of an arithmetic progression with a negative common difference"
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Quiz: Expanding a 3 by 3 determinant along a row or column containing noughts
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WAEC Prep: When Cramer's rule is quicker than elimination
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WAEC Prep: Cramer's rule applied to a pair with fractional coefficients
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Learn: Solving two simultaneous equations by Cramer's rule
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WAEC Prep: What Cramer's rule gives when the system is inconsistent
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WAEC Prep: Setting out Cramer's rule for three simultaneous equations
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WAEC Prep: Writing two simultaneous equations as a single matrix equation
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Spot My Mistake: Why the inverse must be applied on the correct side
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WAEC Prep: When the matrix method is worth the work for three unknowns
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WAEC Prep: Writing three simultaneous equations as a single matrix equation
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WAEC Prep: Mass, and how it differs from weight
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Learn: Inertia, and what mass actually measures
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Quiz: Why mass stays the same wherever the body is taken
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WAEC Prep: Resolving a force into horizontal and vertical components
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Quiz: Recovering the original force from its two components
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WAEC Prep: The forces on a body suspended by a single string
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Learn: A space diagram and a force diagram drawn side by side
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WAEC Prep: The three unknowns a rigid body problem usually carries
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WAEC Prep: The two conditions for a rigid body to be in equilibrium
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Learn: Choosing the point about which to take moments
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