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Show that the points A (– 2, 3, 5), B (1, 2, 3) and C(7, 0, – 1) are collinear.

+2 votes

asked Nov 21, 2018 in Class 12 by kratos

Show that the points A (– 2, 3, 5), B (1, 2, 3) and C(7, 0, – 1) are collinear.

vector algebra
direction cosines
class-9
determinants
coordinate geometry
class-12
directions ratios

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1 Answer

+3 votes

answered Feb 27, 2020 by kratos

Best answer

AB = √14 , BC = 2√14 , AC = 3 √14

(1 mark for any two correct distances)

Showing AB + BC = AC and conclusion

Detailed Answer :

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