The most significant distinction between a PC company and a monopoly is that the monopoly has a downward-sloping demand curve rather than the " perceived " perfectly elastic curve of the PC company.
2.
The vertical deviation of a point A on an elastic curve with respect to the tangent which is extended from another point B equals the moment of the area under the M / EI diagram between those two points ( A and B ).
3.
The deviation at any point on the elastic curve is positive if the point lies above the tangent, negative if the point is below the tangent; we measured it from left tangent, if ? is counterclockwise direction, the change in slope is positive, negative if ? is clockwise direction.
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