Given that the numbers corresponding to a and B on the number axis are - 2 and 4 respectively, P is a moving point on the X number axis, and the corresponding number is X. Q: point a and point P (at the origin) After moving to the right for a few minutes, P is the midpoint of ab

Given that the numbers corresponding to a and B on the number axis are - 2 and 4 respectively, P is a moving point on the X number axis, and the corresponding number is X. Q: point a and point P (at the origin) After moving to the right for a few minutes, P is the midpoint of ab

Let p be the midpoint of AB after t minutes
The speed ratio is 1:10:2, and the distance ratio is t: 10t: 2T;
After t minutes, a point moved to a ': - 2 + T point;
After t minutes, P point moved to p ': 0 + 10t point;
After t minutes, point B moved to point B ': 4 + 2T;
Suppose a moves to the right without crossing o-point, - 2 + T = 0,
(B‘O-A’O)/2+A'O=P‘O,
[4+2t-(-2+t)]/2-2+t=10t
[6+t]/2-2+t=10t
20t=6+t-4+2t
20t-3t=2
T = 2 / 17 (minutes), then the position of point a is - 2 + 2 / 17, because - 2 + 2 / 17