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Show that the points with position vectors 6i - 7j, 16i - 19j - 4k, 3j - 6k and 2i - 5j + 10k are coplanar.

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Show that the points with position vectors 6i - 7j, 16i - 19j - 4k, 3j - 6k and 2i - 5j + 10k are coplanar.

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Because scalar triple product is zero, so points with given positive vectors are coplanar.

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