| mike12-001
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| utf07-004 Imagine a road on which the speed limit is specified at every single point. In other words, there is a certain function $L$ such that the speed limit $x$ miles from the beginning of the road is $ L(x)$. Two cars $A$ and $B$, are driving along this road; car A's position at time $t$ is $ a(t)$, and car B's is $ b(t)$.
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