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Show that the points whose position vectors given by (i) -2i + 3j + 5k, i + 2j + 3k, 7i - k

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Show that the points whose position vectors given by

(i) -2i + 3j + 5k, i + 2j + 3k, 7i - k

(ii) i - 2j + 3k, 2i + 3j - 4k and -7j + 10k 

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1 Answer

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Best answer

(i) Let the given point be A, B and C. To prove A, B and C are collinear we have to prove that 

Now 

The point A, B and C are collinear.

(ii) Let the given point be A, B and C 

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