If \({\rm{A}} = \left[ {\begin{array}{*{20}{c}}1&2&{ - 2}\\2&5&{ - 4}\ – McqOptions

MCQOPTIONS

1.	If \({\rm{A}} = \left[ {\begin{array}{*{20}{c}}1&2&{ - 2}\\2&5&{ - 4}\\3&7&{ - 5}\end{array}} \right]\) then A-1 is
A.	A2 – A + 5I
B.	A2 + A – 5I
C.	A3 – A2 + 5A
D.	A2 – 2A + 5I
Answer» B. A2 + A – 5I

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