1,327 prompts matching "Learn: The formula for the sum of the first n terms of an arithmetic progression"
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WAEC Prep: Calculating a moment as force times perpendicular distance
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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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Spot My Mistake: Finding two unknown tensions from three forces in equilibrium
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Spot My Mistake: When Lami's theorem may be used, and when it may not
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Explain Back: A probability distribution table for a discrete random variable
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WAEC Prep: A Poisson distribution taken over a different length of interval
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Quiz: The situations a Poisson distribution models
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Learn: Finding lambda from a stated mean
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Quiz: The area under the normal curve, and what it represents
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Spot My Mistake: Reading a probability from the standard normal table
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Spot My Mistake: When the normal distribution may approximate the binomial
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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: A vector of magnitude one in three dimensions
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WAEC Prep: Adding three vectors in component form
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WAEC Prep: Adding two vectors given in component form
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Worked Example: Testing two vectors for perpendicularity
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WAEC Prep: Three forces in equilibrium written as vectors
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WAEC Prep: Writing a force as a vector in i and j form
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