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Найди координаты вершины параболы y=-2x2−2x .
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Ветви параболы y=−2x2 направлены
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Определи координаты вершины параболы y=-2,5x2+9,62 .
Ответы 5
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cgfcb,j
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Автор:
kamrenmadden - 5 лет назад
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0
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спасибо
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Автор:
camryn - 5 лет назад
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0
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спасибо
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Автор:
dantew3wh - 5 лет назад
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0
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это легко. Координаты вершины параболы вычисляют за этой формулой: х0=-b/2a
№1. х0=2/-4=-1/2=-0,5;у0=-2*(-1/2)=1
№2. направлены вниз, так как с переду уравнения есть "-".
№3. х0=0;у0=9,62
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Автор:
chili7mpp - 5 лет назад
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0
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1) Координаты вершины параболы находятся по формуле: - b/2a =>
x=-2/2×2 = -0.5
y= -2 × (-0.5)^2 - 2×(-0.5) = 0.5
(-0.5; 0.5) к.в.п
2) Так как а<0, то ветви параболы направлены вниз
3)
х= 0/2×(-2.5) = 0
у=-2.5 ×(0)^2+ 9.62 = 9.62
(0; 9.62) к.в.п
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Автор:
ghoulietpel - 5 лет назад
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0
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