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Hexagonal sphere packing Imagine three unit spheres (radius equal to 1) with centers at O(0, 0, 0),
- a. Find the coordinates of R. (Hint: The distance between the centers of any two spheres is 2.)
- b. Let rij be the
vector from the center of sphere I to the center of sphere J. Find rOP, rOQ, rPQ, rOR, and rPR.
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