The number of distinct real values of λ , for which the lines x - 1 1 = y - 2 2 = z + 3 λ 2 and x…

The number of distinct real values of λ, for which the lines x-11=y-22=z+3λ2 and x-31=y-2λ2=z-12 , are coplanar is
  1. 2
  2. 4
  3. 3
  4. 1

Solution

 Lines are coplanar

3-12-21--312λ21λ22=0

20412λ21λ22=0

24-λ4+4λ2-2=0

4-λ4+2λ2-4=0

λ2λ2-2=0

λ=0, 2, -2

Asked in: JEE Main 2016 (10 Apr Online)

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