y(1) = -21 - 3 = -2 - 3 = -5y(-1) = -2(-1) - 3 = 2 - 3 = -1y(0) = -20 - 3 = -3y(0.5) = -20.5 - 3 = -1 - 3 = -4
y(x) = 1-2x - 3 = 1-2x = 4x = -2
y(x) = -1-2x - 3 = -1-2x = 2x = -1
y(x) = 0-2x - 3 = 0-2x = 3x = -1.5
3.Функция будет принимать отрицательные значения при x > -1.5
y(1) = -21 - 3 = -2 - 3 = -5
y(-1) = -2(-1) - 3 = 2 - 3 = -1
y(0) = -20 - 3 = -3
y(0.5) = -20.5 - 3 = -1 - 3 = -4
y(x) = 1
-2x - 3 = 1
-2x = 4
x = -2
y(x) = -1
-2x - 3 = -1
-2x = 2
x = -1
y(x) = 0
-2x - 3 = 0
-2x = 3
x = -1.5
3.
Функция будет принимать отрицательные значения при x > -1.5