1,267 prompts matching "Quiz: Writing a recurring decimal as a fraction to show it is rational"
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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: Swapping and negating the entries when inverting a 2 by 2 matrix
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WAEC Prep: The inverse of a 3 by 3 matrix from its adjoint and its determinant
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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
I have just studied the inverse of a diagonal matrix in my SS3 Further Mathematics class.
Explain Back: Solving two simultaneous equations by multiplying by the inverse
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Spot My Mistake: Why the inverse must be applied on the correct side
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Worked Example: Checking the solution of three equations by substitution
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WAEC Prep: The resultant of two forces acting at the same point
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Explain Back: The resultant of two forces acting in the same straight line
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Spot My Mistake: Compounding three forces acting at one point
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WAEC Prep: The magnitude of the resultant of two forces inclined at an angle
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Worked Example: The direction of the resultant of two forces
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Learn: The resultant of two perpendicular forces
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Learn: The component of a force along a stated direction
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WAEC Prep: Summing the components of several concurrent forces
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WAEC Prep: Drawing a clear force diagram for a body at rest
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Worked Example: Marking the weight, the normal reaction and the friction on a diagram
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