2) Suppose A E M„(Z) is. Show: A) If det(A) = +1 then A-1 e M„(Z). B) If n = 2 and A-1 e M,(Z) then det(A) = ±1.

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ISBN:9780470458365
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Chapter2: Second-order Linear Odes
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2) Suppose A e M„(Z) is. Show:
A) If det(A) = +1 then A-1 e M,(Z).
В) If п
= 2 and A-1 e M„(Z) then det(A) = ±1.
Transcribed Image Text:2) Suppose A e M„(Z) is. Show: A) If det(A) = +1 then A-1 e M,(Z). В) If п = 2 and A-1 e M„(Z) then det(A) = ±1.
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