how that the given set V is closed under addition and multiplication by scalars and is therefore a subspace of R. is the set of all et a = X ххо X 0 y Z y and b = such that z = 0. u V 0 be two vectors in V. Find their sum a + b. x+u +b= y+v (Simplify your answer.) 0 ne vector sum a + b ddition. ype an integer or a fraction.) ▼an element of the set V because it its third component equal to Therefore, V is closed und

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