Show that (2, 1, 6), (4, 7, 9), and (8, 5, -6) are vertices of a right

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Show that (2, 1, 6), (4, 7, 9), and (8, 5, -6) are vertices of a right triangle.
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Calculus

ISBN: 978-0131429246

9th edition

Authors: Dale Varberg, Edwin J. Purcell, Steven E. Rigdon

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