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Distancia entre dos rectas
Si las rectas r y s son coincidentes o secantes, d(r,s) = 0
Si las rectas r y s son paralelas, sus ecuaciones son de la forma
r: ax+by+c=0
y
s: ax+by+c'=0
y se cumple que:
Calcula la distancia entre las rectas r: 4x-3y+4=0 y s: 4x-3y+9=0
d(r,s) =
