Y= (1-x) e^x Экстремума

Question

Y= (1-x) e^x
Экстремума

Answer 1

Y = (1-x)*eˣ
f'(x) = (1-x)'eˣ + (eˣ)'*(1-x) = -eˣ + eˣ(1-x) = eˣ(-1 + 1 - x) = eˣ*(-x)
f'(x) = 0
eˣ = 0    или    -x = 0
x = ∅               x = 0