1,334 prompts matching "Multiplying and dividing indices in one expression"
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Spot My Mistake: Why matrix subtraction is not commutative
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Learn: The distributive law for a scalar over a sum of matrices
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Spot My Mistake: A symmetric matrix, equal to its own transpose
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Quiz: Why mass stays the same wherever the body is taken
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Learn: The resultant of two perpendicular forces
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Quiz: The magnitude of the resultant of several coplanar forces
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Learn: What an unclosed polygon of forces tells you
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Quiz: The coefficient of friction between two surfaces
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Spot My Mistake: Why friction does not depend on the area of contact
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Learn: The algebraic sum of moments when the senses differ
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Quiz: The situations a Poisson distribution models
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Learn: The probability that a normal variable lies between two values
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Learn: The magnitude of a three-dimensional vector
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Quiz: The direction of a vector as an angle with the x-axis
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Spot My Mistake: The vector from A to B as the difference of two position vectors
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Quiz: The argument of a complex number
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Learn: The cube roots of unity
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Quiz: The time of flight of a projectile
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Learn: Newton's second law written as F equals ma
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Spot My Mistake: The sum of the first n terms of an arithmetic progression
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