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clc
clear
//INPUT DATA
u=3.5*10^2;//Speed of the cyclist in m/s
v=2*10^3;//Speed of the train in m/s
c=3*10^8;//Speed of light in m/s
//CALCULATIONS
U=((u+v)/(1+((u*v)/c^2)))/1000//Relative speed in km/s
//OUTPUT
mprintf('The relative speed is %3.2f*10^3 m/s',U)
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