1,322 prompts matching "Proving the sum formula for a geometric progression"
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Learn: What an unclosed polygon of forces tells you
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Practice: Finding an unknown force from a closed polygon
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WAEC Prep: Why friction is called a self-adjusting force
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Quiz: The coefficient of friction between two surfaces
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Practice: Limiting friction, and the greatest value it can reach
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Spot My Mistake: Why friction does not depend on the area of contact
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WAEC Prep: Calculating a moment as force times perpendicular distance
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WAEC Prep: Why three non-parallel forces in equilibrium must be concurrent
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Practice: Resolving three forces in two perpendicular directions
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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
I have just studied a probability distribution table for a discrete random variable in my
Learn: The expectation of a discrete random variable
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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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Practice: The probability of at least one success
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Quiz: The situations a Poisson distribution models
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Practice: The probability of exactly r events in a Poisson distribution
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Practice: The variance of a binomial distribution as npq
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Learn: The standard deviation of a binomial distribution
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