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Артем00796678756
Артем00796678756
21.11.2022 17:50 •  Алгебра

Не выполняя построения найдите координаты точек пересечения графиков y=3,7 x + 10
y=1,4 x -13

Показать ответ
Ответ:
FrelPro
FrelPro
01.11.2021 12:08
Решение
y = (x + 13)² * (e^x) - 15
Находим первую производную:
y` = (x + 13)² * (e^x) + (2x + 26) * (e^x) = (x + 13)*(x + 15) * (e^x)
Приравняем её к нулю:
(x + 13)*(x + 15) * (e^x) = 0
x₁ = - 13
x₂ = - 15
e^x > 0
Вычисляем значение функции:
f(-13) = - 15
f(- 15) = - 15 + 4/e¹⁵
fmin = - 15
fmax = - 15 + 4/e¹⁵
Используем достаточное условие экстремума функции для одной переменной.
y`` = (x + 13)² + 2*(2x + 26) * (e^x) + 2*(e^x) = (x² + 30x + 223) * (e^x)
Вычисляем:
y``(-15) = - 2/e¹⁵ < 0, значит эта точка - точка максимума
y``(-13) = 2/у¹³ > 0, значит эта точка - точка минимума
0,0(0 оценок)
Ответ:
skymiss
skymiss
02.09.2022 12:11

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