1,334 prompts matching "Give me practice on permutations and combinations"
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Worked Example: A singular matrix, and why it has no inverse
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WAEC Prep: The order of a matrix formed from a table of data
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Learn: Deciding whether a stated matrix calculation is possible at all
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Quiz: Finding an unknown entry from a stated matrix equation
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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: Setting out the coefficient determinant for two simultaneous equations
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WAEC Prep: The inverse of a 2 by 2 matrix with a fractional determinant
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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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Quiz: Checking a 3 by 3 inverse by multiplication
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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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WAEC Prep: When the matrix method is worth the work for three unknowns
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WAEC Prep: Writing three simultaneous equations as a single matrix equation
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Quiz: Solving three simultaneous equations with the inverse matrix
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WAEC Prep: Mass, and how it differs from weight
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Worked Example: The units of mass, and the SI unit
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Quiz: Why mass stays the same wherever the body is taken
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