Calculus 3: Integration - Equations of Lines & Planes (6 of 27) Find the Vector Line Eqn. of a Line

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In this video I will find the vector line equation of a line in 3-D space (when given 2 points).

Next video in the series can be seen at:
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You're honestly my fave maths tutor on YouTube.
Thank you so much for all the help, ​sir.

DiutoAjoku
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WHY did he have to define the r-vector in terms of r-one and r-two when we just determined what the r-vector is?
Why isn't the vector equation given by just r= r-one + Like he did in lesson 2/27???

Festus
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wouldn't it be easier if we computed directly from the equation r= r1 + a? It's easier and faster. Was your method done by intention because it's useful for future things?

Tahycoon