The 300-Mg jet airliner has three engines, each ofwhich produces a nearly constant thrust of 240 kNduring the takeoff roll. Determine the length s ofrunway required if the takeoff speed is 220 km / h.Compute s fi rst for an uphill takeoff direction fromA to B and second for a downhill takeoff from B to Aon the slightly inclined runway. Neglect air and rollingresistance.

Definition 1.1. Given two integers a and d with d non-zero, we say that d divides a (written d | a) if there is an integer c with a = cd. If no such integer exists, so d does not divide a, we write d - a. If d divides a, we say that d is a divisor of a. Proposition 1.2.1: Assume that a, b, and c are integers. If a | b and b | c, then a | c. Proposition 1.3. Assume that a, b, d, x, and y are...