1,299 prompts matching "Rewriting an expression with only positive indices"
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Practice: Why the forces must sum to nought in two perpendicular directions
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Worked Example: Drawing the polygon of forces to scale
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Worked Example: The moment of a force about a point on its own line of action
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Worked Example: The total moment of three parallel forces about one end
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Practice: Resolving three forces in two perpendicular directions
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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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Worked Example: The probability of no events at all in a Poisson distribution
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Worked Example: Finding a value from a given probability by working backwards
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Practice: Using the normal tables when the z-score is negative
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Worked Example: The continuity correction when approximating a discrete distribution
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Practice: The magnitude of the sum of two vectors
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Worked Example: Finding the unit vector in the direction of a given vector
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Practice: A vector of stated magnitude in a given direction
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Worked Example: The position vector of the midpoint of AB
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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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Worked Example: Squaring a complex number
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Practice: Converting a complex number from polar form back to a plus bi
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Practice: Why complex roots of a real quadratic come in conjugate pairs
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