Предмет: Алгебра, автор: lAndy01l

найти наименьшее значение функции
y=x³-3x+8 на отрезке [-3;2]

Ответы

Автор ответа: Аноним
0
1. Вычислим производную и приравняем ее к нулю
y'=3x^2-3 \ y'=0 \ 3(x-1)(x+1)=0 \ x_1=1 \ x_2=-1
2. Определим значение функци в точке x=-1, x=1, x=-3; x=2
y(-3)=-27+9+8=-10 \ y(-1)=-1+3+8=10 \ y(1)=1-3+8=6 \ y(2)=8-6+8=10
Итак, max_{[-3;2]}y(x) = y(-3)=-10
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Предмет: Математика, автор: Аноним