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Wanderson1555
@Wanderson1555
December 2019
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Qual das retas a seguir passa pelo ponto A( -2, 2 ) e é perpendicular a reta r: x + 3y - 5 = 0?
A) 3x - y + 8 = 0
b) y -3x - 8 = 0
c) x - 3y + 6 = 0
d) 3y - x - 6 = 0
e) 6x - y - 8 = 0
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Viniciusbrrt
X+3y-5=0
3y=-x+5
y=-x/3+5/3
m=-1/3
perpendicular
m=3
formula para achar a equação da reta
y-y1=m(x-x1)
y-2=3(x-(-2))
y-2=3x+6
-3x+y-2-6=0
-3x+y-8=0.(-1)
3x-y+8=0
A resposta é letra a)
2 votes
Thanks 3
Viniciusbrrt
pode me dar melhor resposta?
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Lista de comentários
3y=-x+5
y=-x/3+5/3
m=-1/3
perpendicular
m=3
formula para achar a equação da reta
y-y1=m(x-x1)
y-2=3(x-(-2))
y-2=3x+6
-3x+y-2-6=0
-3x+y-8=0.(-1)
3x-y+8=0
A resposta é letra a)