If the straight lines \[x=1+s,\] \[y=-3-\lambda s,\] \[z=1+\lambda s\] and \[x=t/2,y=1+t,z=2-t\], with parameters s and \[t\] respectively, are co-planar, then \[\lambda \]equals [AIEEE 2004]

If the straight lines \[x=1+s,\] \[y=-3-\lambda s,\] \[z=1+\lambda s\]

1.	If the straight lines \[x=1+s,\] \[y=-3-\lambda s,\] \[z=1+\lambda s\] and \[x=t/2,y=1+t,z=2-t\], with parameters s and \[t\] respectively, are co-planar, then \[\lambda \]equals [AIEEE 2004]
A.	0
B.	-1
C.	-0.5
D.	-2
Answer» E.

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