Use determinants to prove that if A,B ∈Mn×n(F) are such that AB =I, then A is invertible (and hence B= A−1).
Use determinants to prove that if A,B ∈Mn×n(F) are such that AB =I, then A is invertible (and hence B= A−1).
Chapter7: Matrices And Determinants
Section: Chapter Questions
Problem 13T
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Use determinants to prove that if A,B ∈Mn×n(F) are such that AB =I, then A is invertible (and hence B= A−1).
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