Find the inverse of
A
=
[
3
0
0
0
3
0
0
0
3
]
\displaystyle {A}={\left[\begin{array}{ccc} {3}&{0}&{0}\\{0}&{3}&{0}\\{0}&{0}&{3}\end{array}\right]}
A
=
⎣
⎡
3
0
0
0
3
0
0
0
3
⎦
⎤
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Enter each element of the matrix as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)