Предмет: Алгебра, автор: Ryba91

дано графік рівняння у=х2+вс+с. Визначте в,с.

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Ответы

Автор ответа: Санечка69

Ответ: b = 2, с = -3.

Объяснение:

если х = 0, о у = с, значит, с = -3.

Абсциссу вершины параболы у = ах² + bx + c (а ≠ 0) можно найті по формуле х = -b/(2а).

Т.к. уравнение, график которого изображен на рисунке, имеет вид: у = х² + bх + с, значит, а = 1.

Найем b:

абсцисса вершины х = -1, значит, -1 = -b/(2 · 1), откуда b = 2.

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