1,288 prompts matching "WAEC exam question: symmetric functions of roots"
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Spot My Mistake: A symmetric matrix, equal to its own transpose
Act as my SS3 Further Mathematics tutor. Work a question on a symmetric matrix, equal to i
Worked Example: A singular matrix, and why it has no inverse
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Explain Back: The order of the answer when two matrices are multiplied
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Learn: The effect on a determinant of swapping two rows
You are my personal SS3 Further Mathematics tutor. Teach me the effect on a determinant of
Explain Back: The determinant of a product as the product of the determinants
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Practice: The sign pattern of the cofactors in a 3 by 3 determinant
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Worked Example: Forming the determinant Dy by replacing the second column
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Explain Back: What a coefficient determinant of nought says about the system
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Practice: Turning a minor into a cofactor with the sign rule
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Explain Back: Writing out the full matrix of cofactors
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Spot My Mistake: Checking cofactors by expanding the determinant along a second row
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Explain Back: Finding the adjoint of a 2 by 2 matrix quickly
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Spot My Mistake: Finding the adjoint of a 3 by 3 matrix
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Worked Example: The identity that A times its adjoint gives the determinant times the identity
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Learn: The order of the steps in inverting a 3 by 3 matrix
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Explain Back: The inverse of a diagonal matrix
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Practice: The parallelogram law of forces
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Explain Back: The resultant of two forces acting in the same straight line
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Learn: The resultant of two perpendicular forces
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Spot My Mistake: The greatest and the least resultant of two given forces
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