731 prompts matching "IGCSE word problem: Designing a question for a survey"
WAEC pitfalls: Confusing a position vector with a displacement vector
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Worked example: Finding the translation that maps one shape onto another
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WAEC pitfalls: Writing a column vector with its components reversed
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Worked example: Finding the mirror line from an object and its image
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WAEC pitfalls: Reflecting in y equals x by negating instead of swapping
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Worked example: Finding the angle of rotation from an object and its image
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WAEC pitfalls: Assuming a positive angle of rotation means clockwise
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Worked example: Finding the centre of enlargement from object and image
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WAEC pitfalls: Assuming a negative scale factor simply shrinks a shape
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Worked example: Multiplying a 2 by 3 matrix by a 3 by 2 matrix
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WAEC pitfalls: Assuming matrix multiplication is commutative
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Worked example: Verifying an inverse by multiplying back to the identity
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WAEC pitfalls: Dividing by a determinant of zero
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Worked example: Solving a 2 by 2 system by the matrix method
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WAEC pitfalls: Writing the coefficients out of order in the matrix
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WAEC pitfalls: Joining the plotted points of a curve with straight lines
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Worked example: Solving a quadratic graphically by adding a straight line
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WAEC pitfalls: Giving a graphical answer to more accuracy than the scale allows
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Worked example: Testing the vertices of the feasible region
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WAEC pitfalls: Ignoring the non-negativity constraints
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