Предмет: Математика, автор: mashazakatovskaya

Помогите решить это) Составить уравнение касательной и нормали к графику: y= -x^3-2x^2-6x M(0;0)

Ответы

Автор ответа: Liamus
0

Уравнение касательной имеет вид:

y=y_0+y'(x_0)\cdot(x-x_0)

В нашем случае имеем

y=-x^3-2x^2-6x,\,x_0=0,\,y_0=0.

Тогда получим следующее

y'=-3x^2-4x-6\Rightarrow y'(x_0)=-6.

Тогда уравнение искомой касательной будет иметь вид:

y=0-6(x-0)\Rightarrow y=-6x.

Уравнение нормали можем найти используя свойство перпендикулярности. Получим уравнение искомой нормали:

y=\frac{1}{6}x

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