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Vector Equations in Space Accelerated Math 3

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Vector r is the position vector to a variable point P(x,y,z) on the line. Point P o =(5,11,13) is a fixed point on the line. Unit vector u points along the line. Let d be the directed distance from P o to P. Thus, the displacement vector from P o to P is Note that the position vector r to the variable point is the sum of and the position vector to the fixed point.

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Ex. 1 Find the particular equation of the line that contains the fixed point P o =(5,11,13) and is parallel to the unit vector

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Ex. 2 Find the point on the line in ex. 1 that is at a directed distance of -21 from P o.

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Ex. 3 Find the point where the line in ex.1 intersects the xy-plane.

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