1) f(x)=(-2/3)x³+2x²-x
f'(x)=(-2/3)*3x²+2*2x-1 =-2x²+4x-1
2) g(x)=(3+2x)/x-2 = 3/x +2 -2 = 3/x
g'(x)=3*(-1)/x^2 = -3/x^2
g'(1) = -3/1^2 = -3/1 = -3
3) g(x)=3x-5x²+x³ = x(3-5x+x²) = x*(x-x1)*(x-x2)
x1= (5+D)/2 x2= (5-D)/2 D=13^(1/2)
ответ отрезек [х2; x1]
1) f(x)=(-2/3)x³+2x²-x
f'(x)=(-2/3)*3x²+2*2x-1 =-2x²+4x-1
2) g(x)=(3+2x)/x-2 = 3/x +2 -2 = 3/x
g'(x)=3*(-1)/x^2 = -3/x^2
g'(1) = -3/1^2 = -3/1 = -3
3) g(x)=3x-5x²+x³ = x(3-5x+x²) = x*(x-x1)*(x-x2)
x1= (5+D)/2 x2= (5-D)/2 D=13^(1/2)
ответ отрезек [х2; x1]