In triangle △ABC, let vectors a = BC, b = CA, and point T be the centroid of triangle △ABC. Then the vector AT is equal to which of the following vectors: (a) 1/3(a+b) (b) 1/3(a-b) (c) 1/3(-a-2b) (d) 1/3(2a+b) (e) 2/3(-a+b).

Algebra and Trigonometry (6th Edition)
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ChapterP: Prerequisites: Fundamental Concepts Of Algebra
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Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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In triangle △ABC, let vectors a = BC, b = CA, and point T be the centroid of triangle △ABC. Then the vector AT is equal to which of the following vectors: (a) 1/3(a+b) (b) 1/3(a-b) (c) 1/3(-a-2b) (d) 1/3(2a+b) (e) 2/3(-a+b).

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