Question

escreva uma matriz C=cij de ordem 3 por 2 tal que cij =i+3j

Answer 1

$C=\left[\begin{array}{cc}c_{11}&c_{12}\\c_{21}&c_{22}\\c_{31}&c_{32}\end{array}\right] _{3x2}$

Calculando os elementos:

$c_{ij}=i+3j\\\\c_{11}=1+3.1=4\\\\c_{12}=1+3.2=7\\\\c_{21}=2+3.1=5\\\\c_{22}=2+3.2=8\\\\c_{31}=3+3.1=6\\\\c_{32}=3+3.2=9$

Assim, a matriz C é:

$C=\left[\begin{array}{cc}4&7\\5&8\\6&9\end{array}\right]$