- #1
CentreShifter
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Inverse of a sum of matrices [solved]
The problem is relatively simple. Given the equation:
[tex](I+2A)^{-1}= \begin{bmatrix}
-1 & 2 \\
4 & 5 \end{bmatrix}[/tex]
Find A.
My problem seems to be that I'm distributing the inverse on the LHS incorrectly. My real question then is, is the following correct?
[tex](I+2A)^{-1}=I^{-1}+\frac{1}{2}A^{-1}[/tex]
The problem is relatively simple. Given the equation:
[tex](I+2A)^{-1}= \begin{bmatrix}
-1 & 2 \\
4 & 5 \end{bmatrix}[/tex]
Find A.
My problem seems to be that I'm distributing the inverse on the LHS incorrectly. My real question then is, is the following correct?
[tex](I+2A)^{-1}=I^{-1}+\frac{1}{2}A^{-1}[/tex]
Last edited: