1,314 prompts matching "Practice: Reversing the sign when multiplying by a negative number"
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Learn: Finding two unknown forces by Lami's theorem
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Spot My Mistake: When Lami's theorem may be used, and when it may not
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Practice: The probability of at least one success
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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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Explain Back: Testing whether data are Poisson by comparing mean and variance
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WAEC Prep: The probability that a normal variable exceeds the mean by more than one standard deviation
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Spot My Mistake: When the normal distribution may approximate the binomial
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Worked Example: The continuity correction when approximating a discrete distribution
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Practice: The components of a vector given its magnitude and direction
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WAEC Prep: The magnitude of a vector after multiplication by a scalar
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Practice: The magnitude of the sum of two vectors
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WAEC Prep: The dot product used to find the work done by a force
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Practice: The dot product as the magnitudes times the cosine of the angle
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Practice: Deciding whether a point lies on a given line
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WAEC Prep: Why the square root of a negative number needs i
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Practice: The sum of a complex number and its conjugate
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Practice: The argument of a complex number in the second or third quadrant
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Practice: The addition of complex numbers shown on an Argand diagram
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WAEC Prep: De Moivre's theorem used with a negative index
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