GATE XE (Engineering Sciences) 2007 - Question 9

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Section: Engineering Mathematics | Marks: 2

Let $M$ be a $2 \times 2$ matrix with eigenvalues 1 and 2. Then $M^{-1}$ is

  • A. $\frac{M - 3I}{2}$
  • B. $\frac{3I + M}{2}$
  • C. $\frac{3I - M}{2}$
  • D. $\frac{-M - 3I}{2}$

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