1,326 prompts matching "Rationalising the denominator when it's a surd minus a surd"
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Spot My Mistake: Forming the determinant Dx by replacing the first column
Act as my SS3 Further Mathematics tutor. Work a question on forming the determinant Dx by
Spot My Mistake: Checking a Cramer's rule solution by substituting back
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Quiz: Arranging the equations in standard form before applying Cramer's rule
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Spot My Mistake: Checking cofactors by expanding the determinant along a second row
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Spot My Mistake: Finding the adjoint of a 3 by 3 matrix
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Spot My Mistake: Why the inverse must be applied on the correct side
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Quiz: Why mass stays the same wherever the body is taken
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Spot My Mistake: The greatest and the least resultant of two given forces
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Spot My Mistake: Drawing the triangle of forces to scale to find an unknown force
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Quiz: The coefficient of friction between two surfaces
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Spot My Mistake: Why friction does not depend on the area of contact
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Spot My Mistake: The moment of a force whose line of action is not perpendicular
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Quiz: The point about which the total moment of a set of forces vanishes
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Spot My Mistake: Using concurrence to find the direction of an unknown third force
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Quiz: The standard deviation of a Poisson distribution
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WAEC Prep: When a Poisson distribution approximates a binomial one
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Quiz: Reading the wording of a question to decide which distribution applies
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Quiz: Writing a two-dimensional vector as a column
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Quiz: The direction cosines of a vector in three dimensions
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Quiz: The vector equation of the line through two given points
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