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Werbeth95
@Werbeth95
December 2019
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O valor de a para que u= (2, a, -1) seja combinação linear dos vetores v= (1, 0, 2) e w= ( 1, 1, 1) é:
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(2, a, -1) =x*
(1, 0, 2) + y*
( 1, 1, 1)
2=x+y ==>x=2-y (i)
a=x*0+y ==>y=a (ii)
-1=2x+y (iii)
(i) em (iii)
-1=2*(2-y) + y
-1=4-2y+y
-5=-y
y=5 ==>a =5 é a resposta
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2=x+y ==>x=2-y (i)
a=x*0+y ==>y=a (ii)
-1=2x+y (iii)
(i) em (iii)
-1=2*(2-y) + y
-1=4-2y+y
-5=-y
y=5 ==>a =5 é a resposta