1,331 prompts matching "Which form of the sum formula to use when r is less than one"
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WAEC Prep: Finding the mean or the standard deviation from a given probability
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Practice: Using the normal tables when the z-score is negative
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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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WAEC Prep: Two vectors that are equal but drawn in different places
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Quiz: Writing a two-dimensional vector as a column
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Spot My Mistake: Drawing a vector as a directed line segment
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Worked Example: The distance between two points in three dimensions
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WAEC Prep: A unit vector, and what makes it a unit
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WAEC Prep: Showing a triangle is right-angled using the dot product
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Worked Example: Testing two vectors for perpendicularity
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Practice: Deciding whether a point lies on a given line
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WAEC Prep: Three forces in equilibrium written as vectors
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Quiz: Subtracting one complex number from another
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Practice: Equating real and imaginary parts to find two unknowns
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Spot My Mistake: Dividing one complex number by another using the conjugate
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WAEC Prep: The argument measured in radians
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WAEC Prep: The conjugate shown on an Argand diagram
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WAEC Prep: Simplifying the answer after using the quotient rule
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Worked Example: The quotient rule for differentiation
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