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MHT CET2017MathematicsMatrices

If the inverse of the matrix α 14 - 1 2 3 1 6 2 3 does not exist then the value of α is

Options

  1. A1
  2. B- 1
  3. C0
  4. D- 2

Correct answer

D. - 2

Step-by-step solution

A = α 14 - 1 2 3 1 6 2 3 A = 7 α + 14 A - 1 does not exists if | A | = 0 ⇒ 7 α + 14 = 0 ⇒ α = - 2

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