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BITSAT2009MathematicsMatricesActual

Find the value of (2 ⁻¹ 1 5 + ⁻¹ 1 2 +2 ⁻¹ 1 8 )

Options

  1. A( / 4 )
  2. B( / 2 )
  3. C(3 / 4 )
  4. DNone of these

Correct answer

A. ( / 4 )

Step-by-step solution

( aligned & 2 ⁻¹ 1 5 + ⁻¹ 1 2 +2 ⁻¹ 1 8 & =2 ⁻¹ 1 5 + 1 8 1- 1 5 1 8 + ⁻¹ 1 7 & =2 ⁻¹ 1 3 + ⁻¹ 1 7 = ⁻¹ 2 1 3 1- 1 9 + ⁻¹ 1 7 & = ⁻¹ 3 4 + ⁻¹ 1 7 = ⁻¹ 3 4 + 1 7 1- 3 4 1 7 & = ⁻¹ 25 25 = ⁻¹ 1=45^ = 4 aligned )

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