Question: Let x0, d2 < n be two given vectors, and d != 0. A set R in R^n in the formR={x:x=x0+tou d,0}is called a ray.

Let x0, d2 < n be two given vectors, and d != 0. A set R in R^n in the formR={x:x=x0+tou d,0}is called a ray. Show that a ray is a convex set.

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