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We say two lines 1,22 are parallel if they have the same direction vectors, that is, if every direction vector for 1 is also a direction vector for 2 and vice versa. For the lines in R2 with the following general equations, determine which are parallel. E, x + y = 0 Justify your answer.

2)Let u, v, w be vectors in R. Suppose that both v and w are orthogonal to 1. Show that every linear combination of v and w is also orthogonal to u.

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