3. Prove that Ov=0 for every vector v in a vector space.
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- Prove that in a given vector space V, the zero vector is unique.Consider the vectors u=(6,2,4) and v=(1,2,0) from Example 10. Without using Theorem 5.9, show that among all the scalar multiples cv of the vector v, the projection of u onto v is the closest to u that is, show that d(u,projvu) is a minimum.Find a basis for R3 that includes the vector (1,0,2) and (0,1,1).