CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

If the straight lines x=1+s,y=3λs,z=1+λs and x=t2,y=1,z=2twith parameters s and trespectively, are co-planar, then λ equals 
[AIEEE 2004]


  1. 0

  2. -1/2

  3. -2

  4. -1


Solution

The correct option is C

-2


We have, x11=y+3λ=z1λ=s
and     x01/2=y11=z21=t
Since, lines are coplanar then
∣ ∣x2x1y2y1z2z1l1m1n1l2m2n2∣ ∣=0∣ ∣1411λλ1/211∣ ∣=0
On Solving, λ=2.

flag
 Suggest corrections
thumbs-up
 
0 Upvotes


Similar questions
View More


People also searched for
View More



footer-image