Question

 Escreva a matriz A = (aij) do tipo 3x4 sabendo que aij = 2i³ – 3j²  

Answer 1

$A= \left[\begin{array}{cccc}a11&a12&a13&a14\\a21&a22&a23&a24\\a31&a32&a33&a34\end{array}\right]$


Sendo aij=2i³-3j²

a11=2(1)³-3(1)²=2-3=-1
a12=2(1)³-3(2)²=2-12=-10
a13=2(1)³-3(3)²=2-27=-25
a14=2(1)³-3(4)²=2-48=-46

a21=2(2)³-3(1)²=16-3=13
a22=2(2)³-3(2)²=16-12=4
a23=2(2)³-3(3)²=16-27=-11
a24=2(2)³-3(4)²=16-48=-32

a31=2(3)³-3(1)²=54-3=51
a32=2(3)³-3(2)²=54-12=42
a33=2(3)³-3(3)²=54-27=27
a34=2(3)³-3(4)²=54-48=6

$A= \left[\begin{array}{cccc}-1&-10&-25&-46\\13&4&-11&-32\\51&42&27&6\end{array}\right]$