Предмет: Алгебра, автор: mashacatfire

2. Чи належить графіку функції у = х2- х +1 точка:
1) А (0 ;-1)
2) В(0; 1)
3) С(2;0)
4) D(1;1)
5) Е(-2;6)


Zombynella: Спасибо)

Ответы

Автор ответа: Zombynella
3

Ответ:

В решении.

Объяснение:

2. Чи належить графіку функції у = х² - х +1 точка:

1) А (0 ;-1)

2) В(0; 1)

3) С(2;0)

4) D(1;1)

5) Е(-2;6)

Чтобы определить принадлежность точки графику, нужно известные значения х и у (координаты точки) подставить в уравнение. Если левая часть равна правой, то принадлежит, и наоборот.

1) у = х² - х +1   А(0; -1)

-1 = 0² - 0 + 1

-1 ≠ 1, не принадлежит.

2) у = х² - х +1   В(0; 1)

1 = 0² - 0 + 1

1 = 1, принадлежит.

3) у = х² - х +1   С(2; 0)

0 = 2² - 2 + 1

0 ≠ 3, не принадлежит.

4) у = х² - х +1   D(1; 1)

1 = 1² - 1 + 1

1 = 1, принадлежит.

5) у = х² - х +1   Е(-2; 6)

6 = (-2)² -(-2) + 1

6 ≠ 7, не принадлежит.

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