Calc III. Vectors and the Geometry of Space

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Homework Help Overview

The problem involves using vectors to find the points of trisection of a line segment defined by the endpoints (1,2) and (7,5). The subject area is vector geometry within the context of Calculus III.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • The original poster expresses uncertainty about how to start and mentions attempting to create a standard vector equation. Other participants suggest describing the line segment in terms of position vectors and question the coordinates of the trisection points.

Discussion Status

Some participants are exploring the relationship between the standard vector and the points of trisection, with one suggesting that scalar multiples of the vector could represent these points. There is an ongoing dialogue about the correct identification of the vector and its implications for finding the trisection points.

Contextual Notes

There appears to be some confusion regarding the definition of the vector and the translation of points back to the original line segment. The original poster is navigating through these concepts without a clear resolution yet.

perc_wiz11
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Homework Statement


Use vectors to find the points of trisection of the line segment with endpoints (1,2) and (7,5).


Homework Equations


Not sure.


The Attempt at a Solution


I don't really know where to start. i tried to create a standard vector equation but its a line segment not a vector.

please help when possible.
 
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If you had two position vectors a and b, then how could you describe the line segment in terms of these vectors? Then what do you imagine the coordinates of position vectors at the trisection points will be?
 
answer question?

once i create a standard vector, can say that the points of trisection are at the scalar multiples of v? then translate them back to the line segment at its original position? so if the standard vector is <6,3> and take 1/3 v the points of trisection on that vector are (2,1) and (4,2). once i translate that, would the answer be (3,3) and (5,4) ?
 
perc_wiz11 said:
once i create a standard vector, can say that the points of trisection are at the scalar multiples of v?
Not without saying what v is!

then translate them back to the line segment at its original position? so if the standard vector is <6,3> and take 1/3 v the points of trisection on that vector are (2,1) and (4,2). once i translate that, would the answer be (3,3) and (5,4) ?
Is v the vector from (1, 2) to (7, 5)? If so, then what you are doing is correct and you have the right answer.
 

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