It is known that 0 is the origin of the number axis, and the corresponding numbers of a and B are 1 and 2 respectively It is known that O is the origin of the number axis, and the corresponding numbers of a and B are 1 and 2 respectively. Let P1 be the midpoint of AB, P2 be the midpoint of AP1, and P100 be the midpoint of p99

The latter is the midpoint of the former
(P1 + P100) / 2 =? P100 =?
If you get P100, the problem will be solved. I don't know if I remind you that this problem seems to be solved by arithmetic sequence

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