JEE (Advanced) 2008 Paper-2

Instructions

Consider the lines
$$L_1:\frac{x+1}{3} = \frac{y+2}{1} = \frac{z+1}{2}$$
$$L_1:\frac{x-2}{1} = \frac{y+2}{2} = \frac{z-3}{3}$$

Question 17

The unit vector perpendicular to both $$L_1$$ and $$L_2$$ is


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