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Mathematics 11 Online
OpenStudy (anonymous):

In the triangle OAB, a = OA = i + 2j + k and b = OB = -2i + j + 3k. M is a point on OB such that AM is perpendicular to OB. Let OM = u OB. 1) Find exact value of u and state the coordinates of point M.

OpenStudy (anonymous):

draw it?

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