Question
If A and B are invertible matrices, then which of the following is not correct?
Options :
adj A = |A|.A⁻¹
det (a)⁻¹ = [det (a)]⁻¹
(AB)⁻¹ = B⁻¹A⁻¹
(A + B)⁻¹ = B⁻¹ + A⁻¹
Answer :
(A + B)⁻¹ = B⁻¹ + A⁻¹
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