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Clarameloo
@Clarameloo
November 2019
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Se o vértice da parábola dada por y= x²-4x+m é o ponto (2,5), então o valor de m é:
a) 0
b) 5
c) -5
d) 9
c) -9
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albertrieben
Verified answer
Boa tarde
f(x) = x² - 4x + m
a = 1
b = -4
c = m
Vértice
Vx = -b/2a = 4/2 = 2
Vy = f(2) = 4 - 8 + m = 5
m = 5 + 4 = 9 (D)
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Verified answer
Boa tardef(x) = x² - 4x + m
a = 1
b = -4
c = m
Vértice
Vx = -b/2a = 4/2 = 2
Vy = f(2) = 4 - 8 + m = 5
m = 5 + 4 = 9 (D)