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Show that the points with the position v...

Show that the points with the position vectors `2 hat i + 6 hat j + 3 hat k, hat i + 2 hat j + 7 hat k` and `3 hat i + 10 hat j - hat k` are collinear.

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The correct Answer is:
Direction ratios of AB : -1, -4, 4,
Directions ratios of AC : 1, 4, -4
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