Three small objects lie on the x-axis. The one on the left has a mass of
(n1m). The one in the middle has a mass of m, and the one on the
right has a mass of (n2m). The left object is located a distance of
d to the left and the right object a distance of 2d to the right of the middle
object. If the force on the object in the middle is F = n3
Gm2/d2i, what is n3? Note that all
the integers are unitless, and the unit vector i points to the right.
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