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Квадратичные функции: верно/ложно

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Квадратичные функции: верно/ложно

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Квадратные функции 8 класс: верно/ложно

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Lol LOL
Lol LOL
Kazakhstan

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Квадратичные функции: верно/ложно
 

Квадратичные функции: верно/ложноOnline version

Квадратные функции 8 класс: верно/ложно

by Lol LOL
1

Сумма корней равна b/a.

2

У квадратной функции y=ax^2+bx+c (a≠0) вершина параболы находится в точке x = -b/(2a).

3

Вершина параболы всегда имеет целые координаты.

4

Форма y=a(x-h)^2+k требует, чтобы коэффициент a был равен 1.

5

В форме y=a(x-h)^2+k вершина параболы находится в точке (h,k).

6

Парабола открывается вверх при a>0 и вниз при a<0.

7

Дискриминант D=b^2-4ac определяет число вещественных корней: D>0 — два корня, D=0 — один корень, D<0 — нет вещественных корней.

8

Если дискриминант равен 0, то у функции нет корней.

9

Дискриминант может быть отрицательным только если a=0.

10

Вершина параболы имеет координаты (-b/(2a), f(-b/(2a))).

 
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