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Find a unit vector perpendicular to the plane determined by the points `(1,-1,2),(2,0,-1)a n d(0,2,1)dot`

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To find a unit vector perpendicular to the plane determined by the points \( A(1, -1, 2) \), \( B(2, 0, -1) \), and \( C(0, 2, 1) \), we can follow these steps: ### Step 1: Define the Points Let: - Point \( A = (1, -1, 2) \) - Point \( B = (2, 0, -1) \) - Point \( C = (0, 2, 1) \) ...
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