Question 197959
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A vertical line has the characteristic that ALL of the x-coordinates of points on the line are equal.  The equation of a vertical line is of the form *[tex \LARGE  x = a] where *[tex \LARGE  a] is the value of the x-coordinate of any point on the line.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
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