A= (aij)3x3 tal que aij = i - 2j
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aij=i-2j
a11=1-2.1=1-2=-1
a12=1-2.2=1-4=-3
a13=1-2.3=1-6=-5
a21=2-2.1=2-2=0
a22=2-2.2=2-4=-2
a23=2-2.3=2-6=-4
a31=3-2.1=3-2=1
a32=3-2.2=3-4=-1
a33=3-2.3=3-6=-3
![A_{33}= \left[\begin{array}{ccc}-1&-3&-5\\0&-2&-4\\1&-1&-3\end{array}\right]](https://tex.z-dn.net/?f=+A_%7B33%7D%3D++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-1%26amp%3B-3%26amp%3B-5%5C%5C0%26amp%3B-2%26amp%3B-4%5C%5C1%26amp%3B-1%26amp%3B-3%5Cend%7Barray%7D%5Cright%5D+ "A_{33}= \left[\begin{array}{ccc}-1&-3&-5\\0&-2&-4\\1&-1&-3\end{array}\right]")
a11=1-2.1=1-2=-1
a12=1-2.2=1-4=-3
a13=1-2.3=1-6=-5
a21=2-2.1=2-2=0
a22=2-2.2=2-4=-2
a23=2-2.3=2-6=-4
a31=3-2.1=3-2=1
a32=3-2.2=3-4=-1
a33=3-2.3=3-6=-3
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