1,326 prompts matching "What the formula gives when the discriminant is nought"
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Spot My Mistake: Orders that make a product possible one way round but not the other
Act as my SS3 Further Mathematics tutor. Work a question on orders that make a product pos
Spot My Mistake: Forming the determinant Dx by replacing the first column
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Spot My Mistake: Checking cofactors by expanding the determinant along a second row
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Spot My Mistake: Finding the adjoint of a 3 by 3 matrix
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Worked Example: The identity that A times its adjoint gives the determinant times the identity
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Spot My Mistake: Why the inverse must be applied on the correct side
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WAEC Prep: The newton, and how it is defined
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Spot My Mistake: Drawing the triangle of forces to scale to find an unknown force
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Spot My Mistake: Why friction does not depend on the area of contact
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Spot My Mistake: Using concurrence to find the direction of an unknown third force
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WAEC Prep: The variance of a discrete random variable
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WAEC Prep: The four conditions a binomial situation must satisfy
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Spot My Mistake: The probability of exactly r successes in n trials
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WAEC Prep: The probability of at least one event in a Poisson distribution
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Worked Example: The probability of no events at all in a Poisson distribution
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WAEC Prep: Comparing the mean with the variance of a binomial distribution
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WAEC Prep: The mean of a binomial distribution as np
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WAEC Prep: The variance of a Poisson distribution over two intervals
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WAEC Prep: Using the mean of a Poisson distribution to find a probability
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WAEC Prep: Why the mean and the variance of a Poisson distribution are equal
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