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GATE ECE 2005 | Question-33

Let, $\mathrm{A}=\left[\begin{array}{cc}2 & -0.1 \\ 0 & 3\end{array}\right]$ and $\mathrm{A}^{-1}=\left[\begin{array}{ll}\frac{1}{2} & \mathrm{a} \\ 0 & \mathrm{~b}\end{array}\right]$ Then $(a+b)=$

  1. $\frac{7}{20}$
  2. $\frac{3}{20}$
  3. $\frac{19}{60}$
  4. $\frac{11}{20}$
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