f'(x)=-2/x^2-2x
x+1/x^2=0
(x^3+1)/x^2=0
x=-1
f''=4/x^3-2
f''(-1)<0 mах
f(-1)=-2-1=-3
(-1;-3) максимум
f'(x)=-2/x^2-2x
x+1/x^2=0
(x^3+1)/x^2=0
x=-1
f''=4/x^3-2
f''(-1)<0 mах
f(-1)=-2-1=-3
(-1;-3) максимум