A line passes through the points (7,-4,8) and (9,0,5)
i) Determine the parametric and symmetric equations of the line
ii)Find any other point on the line
iii)Show that the line does not pass through the origin
i) The collinear vector of a line is Then the symmetric equation of the line is
It follows that the parametric equation of the line is
ii) For we have that
Then the point is on the line.
iii) If then and hence On the other hand for we have that and hence the line does not pass through the origin.
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