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OpenStudy (anonymous):
Help Please! Find a unit vector with positive first coordinate that is orthogonal to the plane through the points P = (4, 2, -1), Q = (9, 7, 4), and R = (9, 7, 6).
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OpenStudy (dan815):
okay
OpenStudy (dan815):
take the cross product and normailze it
OpenStudy (dan815):
|dw:1415738624526:dw|
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