Engineering
Mathematics
Multiplication of Matrices
Symmetric and Skew Symmetric Matrices
Question
If A is a matrix of order 3 × 3, then find (A2)–1.
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Solution
(A2)–1 = (A.A)–1 [∵ (AB)–1 = B–1A–1]
= A–1.A–1 = (A–1)2
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