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CarolineAraki
@CarolineAraki
January 2020
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O vértice da parábola y=2x^2 - 4x + 5 é o ponto:
a)(2,5)
b)(-1, √11)
c)(-1, 11)
d)(1,√3)
e)(1,3)
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CRIZPAULO
Y=2x^2 - 4x + 5
a: 2
b: -4
c : 5
xv= -b/2a
xv= -(-4)/2•2
xv=4/4
xv=1
achando o valor de ∆
∆= (-4)^2-4•2•5
∆=16-40
∆= -24
yv= -∆/4a
yv= -(-24)/4•2
yv= 24/8
yv= 3
opção correta : (e)
vértice da parábola (1 , 3)
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a: 2
b: -4
c : 5
xv= -b/2a
xv= -(-4)/2•2
xv=4/4
xv=1
achando o valor de ∆
∆= (-4)^2-4•2•5
∆=16-40
∆= -24
yv= -∆/4a
yv= -(-24)/4•2
yv= 24/8
yv= 3
opção correta : (e)
vértice da parábola (1 , 3)