If A = 2 2 9 4 æ ö ç ÷ è ø and I = 1 0 0 1 æ ö ç ÷ è ø , then 10A–1 is equal to:

Question:

If $\mathrm{A}=\left(\begin{array}{ll}2 & 2 \\ 9 & 4\end{array}\right)$ and $\mathrm{I}=\left(\begin{array}{ll}1 & 0 \\ 0 & 1\end{array}\right)$, then $10 \mathrm{~A}^{-1}$ is equal to:

  1. $A-4 I$

  2. $6 I-A$

  3. $A-6 I$

  4. $4 I-A$


Correct Option: 3

JEE Main Previous Year 1 Question of JEE Main from Mathematics Inverse Trigonometric Functions chapter.
JEE Main Previous Year Jan. 8, 2020 (II)

Solution:

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