a) resposta
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/-2 4\ | /-1 3\ /-3 -9\
2| | - | | |+ | |
\1 -5/
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a) resposta
--
/-2 4\ | /-1 3\ /-3 -9\
2| | - | | |+ | |
\1 -5/
2a.transposta=
-4 8
2 -10
(b+c. transposta)=
-4 -6
2 2
2a.transposta - (b+c.transposta)=
0 14
0 -12
b)
1/3.c=
-1 0
-3 2
(b.transposta - a)=
1 -3
-1 1
1/3.c + (b.transposta - a)=
0 -3
-4 3