Give a representation of A [ B, A B and A B as intervals.
A ball falls to the ground from an initial height h1 = 1m and then bounces back to a height h2 = 3 4h1, falls back down and then bounces to a height h3 = 3 4h2. What is the total distance the ball will travel until the 10th time it hits the ground?
Problem: Child psychology-language acquisition and theory of the mind