Is (A+B)^{-1} equal to A^{-1} + B^{-1} for equal sized matrices?

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SUMMARY

The inverse of the sum of two equal-sized matrices, (A+B)^{-1}, is not equal to the sum of their inverses, A^{-1} + B^{-1}. This conclusion is definitive and is supported by matrix theory. The properties of matrix inverses dictate that the relationship does not hold true for general matrices, regardless of their dimensions.

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gtfitzpatrick
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Quick question, is (A+B)[tex]^{-1}[/tex] = A[tex]^{-1}[/tex] + B[tex]^{-1}[/tex]

where A and B are equal sized nxn matrices.
Thanks a mill
 
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no the inverse of (A+B) does not equal inverseA+inverseB
 


cheers, thanks a mill
 

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