Question

Por favor alguém me ajudar

Answer 1

Resposta:

letra c) 36

Explicação passo-a-passo:

A = $\left[\begin{array}{ccc}a_{11} &a_{12} &a_{13} \\a_{21} &a_{22} &a_{23} \\a_{31} &a_{32} &a_{33} \end{array}\right]$ $_{3x3}$

a$_{11}$= 1+1=2

a$_{12}$= 1+2=3

a$_{13}$= 1+3=4

a$_{21}$= 2+1= 3

a$_{22}$= 2+2= 4

a$_{23}$= 2+3= 5

a$_{31}$= 3+1= 4

a$_{32}$= 3+2= 5

a$_{33}$= 3+3= 6

A=$\left[\begin{array}{ccc}2&3&4\\3&4&5\\4&5&6\end{array}\right]_{3x3}$

A=$\left[\begin{array}{ccc}2+3+4\\3+4+5\\4+5+6\end{array}\right] = \left[\begin{array}{ccc}9\\12\\15\end{array}\right] = 9+12+15= 36$