1,332 prompts matching "Finding an unknown coordinate using the gradient formula"
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WAEC Prep: When Cramer's rule is quicker than elimination
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Learn: Solving two simultaneous equations by Cramer's rule
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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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WAEC Prep: The cofactor of a corner entry
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WAEC Prep: Why the cofactor signs alternate
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Practice: Turning a minor into a cofactor with the sign rule
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WAEC Prep: The adjoint of the identity matrix
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Practice: Why a 2 by 2 matrix with determinant nought cannot be inverted
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Learn: The order of the steps in inverting a 3 by 3 matrix
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WAEC Prep: Simultaneous equations with fractional coefficients solved by matrix
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WAEC Prep: Writing two simultaneous equations as a single matrix equation
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Spot My Mistake: Why the inverse must be applied on the correct side
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Practice: What a singular coefficient matrix says about the equations
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WAEC Prep: Writing three simultaneous equations as a single matrix equation
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Practice: Comparing the inverse method with elimination for three equations
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Worked Example: Checking the solution of three equations by substitution
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WAEC Prep: Mass, and how it differs from weight
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Learn: Inertia, and what mass actually measures
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Quiz: Why mass stays the same wherever the body is taken
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