If the lines

Question:

If the lines $\frac{x-2}{1}=\frac{y-3}{1}=\frac{z-4}{-k}$ and $\frac{x-1}{k}=\frac{y-4}{2}=\frac{z-5}{1}$ are coplanar, then $k$ can have :

  1. any value

  2. exactly one value

  3. exactly two values

  4. exactly three values.


Correct Option: , 3

Solution:

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