757 prompts matching "Teach me again: Writing an expression for a described quantity"
WAEC pitfalls: Substituting into the original function instead of the derivative
Act as my SS3 Mathematics tutor. Show me the mistake candidates most often make on substit
Worked example: Sketching a cubic using its stationary points
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WAEC pitfalls: Omitting to test the nature of a stationary point
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Worked example: A ladder sliding down a wall as a related-rate problem
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Worked example: Integrating a polynomial term by term
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WAEC pitfalls: Dividing by the original index instead of the new one
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WAEC pitfalls: Dropping the negative sign when reversing a vector
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Worked example: Proving three points are collinear with vectors
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WAEC pitfalls: Reflecting in y equals x by negating instead of swapping
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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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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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Worked example: Testing the vertices of the feasible region
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WAEC pitfalls: Ignoring the non-negativity constraints
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WAEC pitfalls: Reading the quartiles off the wrong axis
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WAEC pitfalls: Dividing by the wrong number of items
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WAEC pitfalls: Comparing two pie charts of different totals directly
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Worked example: Rounding a number whose leading digits are zeros
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