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If a¯,b¯ and c¯ are position vectors of the points A, B, C respectively and 5a¯-3b¯-2c¯=0¯, then find the ratio in which the point C divides the line segement BA. - Mathematics and Statistics

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Question

If `bara, barb` and `barc` are position vectors of the points A, B, C respectively and `5bara - 3barb - 2barc = bar0`, then find the ratio in which the point C divides the line segement BA.

Sum
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Solution

`5bara - 3barb - 2barc` = 0

∴ `2barc = 5bara - 3barb`

∴ `barc = (5bara - 3barb)/2`

∴ `barc = (5bara - 3barb)/(5 - 3)`

∴ The point C divides the line segment BA externally in ratio 5:3

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Chapter 1.5: Vectors and Three Dimensional Geometry - Short Answers I
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