1,300 prompts matching "Index laws with an unknown letter base"
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WAEC Prep: Writing the transpose of a matrix by turning rows into columns
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Spot My Mistake: A symmetric matrix, equal to its own transpose
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WAEC Prep: The identity matrix, and what it does in a product
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Quiz: The zero matrix, and how it differs from nought in arithmetic
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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: Expanding a 3 by 3 determinant down a column
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WAEC Prep: Expanding a 3 by 3 determinant along the first row
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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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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: Setting out Cramer's rule for three simultaneous equations
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Quiz: Arranging the equations in standard form before applying Cramer's rule
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WAEC Prep: The minor of an entry of a 3 by 3 matrix
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Practice: Turning a minor into a cofactor with the sign rule
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Spot My Mistake: Checking cofactors by expanding the determinant along a second row
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