Let α → = λ - 2   a → + b → and β → = 4 λ - 2   a…

Let α=λ-2 a+b and β=4λ-2 a+3b, be two given vectors where vectors a and b are non-collinear. The value of λ for which vectors α and β are collinear, is:
  1. -4
  2. -3
  3. 4
  4. 3

Solution

α,β are collinear then, λ-24λ-2=13λ=-4.

Asked in: JEE Main 2019 (10 Jan Shift 2)

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