1,190 prompts matching "Deciding between tautology, contradiction and contingency"
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WAEC Prep: Evaluating 2A plus 3B for two given matrices
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Practice: Evaluating AB minus BA
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Quiz: Finding an unknown entry from a stated matrix equation
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WAEC Prep: The determinant of a matrix with a row of noughts
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WAEC Prep: The determinant of the identity matrix
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WAEC Prep: The determinant of a 2 by 2 matrix as ad minus bc
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Learn: The effect on a determinant of swapping two rows
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WAEC Prep: The determinant of a 3 by 3 matrix with two equal rows
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Practice: The sign pattern of the cofactors in a 3 by 3 determinant
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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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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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Learn: Solving two simultaneous equations by Cramer's rule
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WAEC Prep: The determinant Dz in a system of three unknowns
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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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Spot My Mistake: Checking a Cramer's rule solution by substituting back
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WAEC Prep: The cofactor of a corner entry
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WAEC Prep: Why the cofactor signs alternate
Act as my WAEC Further Mathematics coach. I am in SS 3. Take me through why the cofactor s