1,334 prompts matching "Logical reasoning with 'and' versus 'or' in sets"
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Practice: Turning a minor into a cofactor with the sign rule
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Spot My Mistake: Checking cofactors by expanding the determinant along a second row
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WAEC Prep: How long the inverse of a 3 by 3 matrix takes, and how to shorten it
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Practice: Comparing the inverse method with elimination for three equations
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WAEC Prep: Resolving a force into horizontal and vertical components
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Worked Example: Marking the weight, the normal reaction and the friction on a diagram
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WAEC Prep: The triangle of forces used together with the cosine rule
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Quiz: A rod resting against a wall, and the concurrence of its three forces
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WAEC Prep: The standard normal distribution, with mean nought and variance one
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Spot My Mistake: Reading a probability from the standard normal table
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WAEC Prep: Finding the mean or the standard deviation from a given probability
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WAEC Prep: Writing a two-dimensional vector in i and j form
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WAEC Prep: Writing a three-dimensional vector in i, j and k form
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WAEC Prep: The resultant force on a particle given in i and j form
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WAEC Prep: Writing a force as a vector in i and j form
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WAEC Prep: De Moivre's theorem used with a negative index
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WAEC Prep: Expanding cos of 3 theta using de Moivre's theorem
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Quiz: Newton's third law, and identifying the pair of forces
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Worked Example: Finding the first term and the common difference from two given terms
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WAEC Prep: Expanding a bracket by the binomial theorem
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