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Vectors and Plane Geometry

zero does not change a vector. Such an element is also is called a neutral element for addition, and it is unique. Obviously, 0 = (0,0) is the vector both of whose coordinates are zero. In words, (5) says that every vector v has an additive inverse v′. Nec-essarily, and also in a more general setting, it will be unique. If v = (a,b),