1,325 prompts matching "Rationalising when both terms of the denominator are surds"
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Worked Example: What a determinant of nought means for a 2 by 2 matrix
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Spot My Mistake: Forming the determinant Dx by replacing the first column
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Spot My Mistake: Finding the adjoint of a 3 by 3 matrix
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Learn: Swapping and negating the entries when inverting a 2 by 2 matrix
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Learn: The order of the steps in inverting a 3 by 3 matrix
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Learn: The resultant of two perpendicular forces
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Spot My Mistake: The greatest and the least resultant of two given forces
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Learn: The component of a force along a stated direction
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Quiz: The magnitude of the resultant of several coplanar 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: 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: A rod resting against a wall, and the concurrence of its three forces
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Learn: The expectation of a discrete random variable
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Worked Example: Finding a particular term of a binomial expansion
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Learn: Finding the coefficient of a stated power in an expansion
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Spot My Mistake: The probability of exactly r successes in n trials
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Learn: The standard deviation of a binomial distribution
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