a11 a12 2 5
a21 a22 5 8
a31 a32 10 13
a41 a42 17 20
a11 = i^2 + j^2 =(1)^2+(1)^2=1+1=2
a12 = i^2 + j^2=(1)^2+(2)^2=1+4=5
a21 = i^2 + j^2=(2)^2+(1)^2=4+1=5
a22 = i^2 + j^2=(2)^2+(2)^2=4+4=8
a31 = i^2 + j^2=(3)^2+(1)^2=9+1=10
a32 = i^2 + j^2=(3)^2+(2)^2=9+4=13
a41 = i^2 + j^2=(4)^2+(1)^2=16+1=17
a42 = i^2 + j^2=(4)^2+(2)^2=16+4=20
a) a21= 5 V
b) a42-a31= 10 ==> 20-10 ==>V
c) a32+a11= 12 ==> 13 +2 = 14 ==> F
d) a12-a22= -3 ==> 5 - 8 = - 3 ==> V
letra C