Question

escreva a matriz (aij)2×2, tal que aij= i-j

Answer 1

(a11. a12) (0. -1)
(a21. a22) (1. 0)
aij=i-j. aij=i-j
a11=1-1. a12=1-2
a11=0. a12=-1
aij=i-j. aij=i-j
a21=2-1. a22=2-2
a21=1. a22=0

Answer 2

$A2x2= \left[\begin{array}{cc}a11=(1-1)&a12=(1-2)\\a21=(2-1)&a22=(2-2)\end{array}\right] = \left[\begin{array}{cc}0&-1\\1&0\end{array}\right]$

extra: detA=1

bons estudos!