quem sabe faz bonito ai!
u // v porque (3/2)u = -v ou u = -(2/3)v
u // t porque u = 2(2, -3, 1) e t = 5(2, -3, 1) => t = (5/2)u
w nao~ // u, v, t porque aquaçao~
k.u = (4k, -6k, 2k) = (14, -21, 9) => 4k = 14 e -6k= - 21 e 2k = 9
=> k = 3,5 et 4,5 !! contradiçao~.
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u // v porque (3/2)u = -v ou u = -(2/3)v
u // t porque u = 2(2, -3, 1) e t = 5(2, -3, 1) => t = (5/2)u
w nao~ // u, v, t porque aquaçao~
k.u = (4k, -6k, 2k) = (14, -21, 9) => 4k = 14 e -6k= - 21 e 2k = 9
=> k = 3,5 et 4,5 !! contradiçao~.