1,319 prompts matching "The inverse of the identity element itself"
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Learn: Deciding whether a stated matrix calculation is possible at all
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WAEC Prep: Expanding a 3 by 3 determinant along the first row
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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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Worked Example: Forming the determinant Dy by replacing the second column
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WAEC Prep: What Cramer's rule gives when the system is inconsistent
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Quiz: Arranging the equations in standard form before applying Cramer's rule
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Learn: Swapping and negating the entries when inverting a 2 by 2 matrix
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Practice: What a singular coefficient matrix says about the equations
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WAEC Prep: When the matrix method is worth the work for three unknowns
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WAEC Prep: A particle, and what the word assumes
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WAEC Prep: A rigid body, and what the word assumes
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Quiz: Why mass stays the same wherever the body is taken
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WAEC Prep: The difference between a kilogram and a kilogram weight
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WAEC Prep: The newton, and how it is defined
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WAEC Prep: Why one component vanishes when the direction is chosen well
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Quiz: Recovering the original force from its two components
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WAEC Prep: The forces on a body resting on a rough horizontal plane
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WAEC Prep: The forces on a body suspended by a single string
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Worked Example: Marking the weight, the normal reaction and the friction on a diagram
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