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Mathematics
If A and B are invertible matrices then which of the following is not correct?
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Q. If $A$ and $B$ are invertible matrices then which of the following is not correct?
KCET
KCET 2021
Determinants
A
$\operatorname{adj} A =|A| A ^{-1}$
21%
B
$\operatorname{det}\left( A ^{-1}\right)=[\operatorname{det}( A )]^{-1}$
30%
C
$( AB )^{-1}= B ^{-1} A ^{-1}$
3%
D
$(A+B)^{-1}=B^{-1}+A^{-1}$
45%
Solution:
$(A+B)^{-1}=B^{-1}+A^{-1}$