question_answer

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, if     AIEEE  Solved  Paper-2003

A)                                         k = 0 or - 1      

B)                       k = 1 or ? 1                         

C) k = 0 or -3      

D)                       k = 3 or -3

Correct Answer: C

Solution :

If the equations of the lines are  and  then these two lines are coplanar, if Given lines    ... (i) and                   ... (ii)             are coplanar. if                                                                                                                            or ? 3