1,320 prompts matching "Explaining why a^1/n means the nth root of a"
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Learn: Swapping and negating the entries when inverting a 2 by 2 matrix
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Practice: Why a 2 by 2 matrix with determinant nought cannot be inverted
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WAEC Prep: A table of components used to find a resultant
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Explain Back: Showing that a system of concurrent forces is in equilibrium
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Worked Example: Marking the weight, the normal reaction and the friction on a diagram
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Learn: Choosing the point about which to take moments
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WAEC Prep: Why friction is called a self-adjusting force
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WAEC Prep: Using concurrence to locate an unknown line of action
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WAEC Prep: Why three non-parallel forces in equilibrium must be concurrent
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Learn: Finding two unknown forces by Lami's theorem
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WAEC Prep: A Poisson distribution taken over a different length of interval
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Explain Back: Finding n and p from a given mean and variance
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Learn: Finding lambda from a stated mean
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Learn: The probability that a normal variable lies between two values
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WAEC Prep: A question whose wording hides which distribution is meant
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Worked Example: The continuity correction when approximating a discrete distribution
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Worked Example: The distance between two points in three dimensions
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WAEC Prep: A vector of magnitude one in three dimensions
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WAEC Prep: Using a unit vector to write a force of given size
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Learn: The unit vectors i, j and k
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