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Home  >>  CBSE XII  >>  Math  >>  Model Papers
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If the equation of the line AB is \( \large\frac{x-3}{1}=\frac{y-2}{-2}=\frac{z-5}{4}\), find the direction ratios of a line parallel to AB.

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  • If two lines are parallel then the ratio of their direction ratios are proportional.
Step 1:
Equation of the given line $AB$ is
\( \large\frac{x-3}{1}=\frac{y-2}{-2}=\frac{z-5}{4}\)
If two lines are parallel then the ratio of their direction ratios are proportional.
Hence the direction ratios of the line parallel to AB is
$1k,-2k,4k$
Where $k$ is a constant.
answered Sep 24, 2013 by sreemathi.v
 

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