Equations of Lines and Planes: Examples

1. Find the Parametric and Symmetric equations of the line passing through the points (1,5,3) and (2,-4,1).

 

Answer:

 

First, we need to find a vector produced by the two points:
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Next, we take the vector and the point (1,5,3) and plug it into the formula for parametric equations:
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For the symmetric equations, we solve for $t$ in each equation and set all of the equations equal to each other:
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2. Find the linear equation of a plane formed by the vectors <1,1,1> and <3,1,2> at the point (5,-3,2).

 

Answer:

 

First we must find the normal vector by taking the cross product of the two vectors
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Then we find the equation by using the formula:
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