The two ends of the line segment AB with fixed length of 3 move on the parabola y ^ 2 = X. note that the midpoint of the line segment AB is m. calculate the shortest distance from the point m to the Y axis, and calculate the M coordinate at this time What is the second definition.

The two ends of the line segment AB with fixed length of 3 move on the parabola y ^ 2 = X. note that the midpoint of the line segment AB is m. calculate the shortest distance from the point m to the Y axis, and calculate the M coordinate at this time What is the second definition.

Because m is the midpoint of AB, the distance from m to y axis is equal to half of the sum of the distances from a and B to y axis. Because point a is on a parabola, the distance from a to y axis = the distance from a to focus f (0.25,0) - 0.25, so is point B. so the distance from m to y axis is expressed as d = (AF + bf-0.5) △ 2