Question

como construir uma matriz 3x3 aij= 3. (j2+i2)

Answer 1

$a_{11}={1}^{2}+{1}^{2}=1+1=2\\a_{12}={1}^{2}+{2}^{2}=1+4=5\\a_{13}={1}^{2}+{3}^{2}=1+9=10$

$a_{21}={2}^{2}+{1}^{2}=4+1=5\\a_{22}={2}^{2}+{2}^{2}=4+4=8\\a_{23}={2}^{2}+{3}^{2}=4+9=13$

$a_{31}={3}^{2}+{1}^{2}=9+1=10\\a_{32}={3}^{2}+{2}^{2}=9+4=13\\a_{33}={3}^{2}+{3}^{2}=9+9=18$

$\huge\mathtt{A=\begin{bmatrix}2&5&10\\5&8&13\\10&13&18\end{bmatrix}}$