Question

Me ajude com essa matriz

Answer 1

A + I3

A=

a   b    c

d   e    f

g   h    i

I3=

1  0   0

0  1   0

0  0   1

a+1=1 ===>a=0

b+0=5 ==>b=5

c+0=2 ==>c=2

d+0=0 ==>d=0

e+1=-7 ==>e=-8

f+0=8 ==>f=8

g+0=-1 ==>d=-1

h+0=3 ==> h=3

i+1=0 ==> i=-1

A=

0      5    2

0     -8    8

-1     3   -1