Question

(aij)3x3 tal que aij= {1,se i =j             {0,se i ≠j

Answer 1

$\left[\begin{array}{ccc}a_{11}&a_{12}&a_{13}\\a_{21}&a_{22}&a_{23}\\a_{31}&a_{32}&a_{33}\end{array}\right] = \left[\begin{array}{ccc}1&0&0\\0&1&0\\0&0&1\end{array}\right]$

Espero ter ajudado. :))

Answer 2

Olá Carol.

a₁₁= 1
a₁₂= 0
a₁₃= 0

a₂₁= 0
a₂₂= 1
a₂₃= 0

a₃₁= 0
a₃₂=0
a₃₃= 1

$\left[\begin{array}{ccc}1&0&0\\0&1&0\\0&0&1\end{array}\right]$