Решите неравенство f' (x) <0, если: 1. f (x) =14-x^3/3+4x
2. f (x) =-2/x^2
3. f (x) =√2-x
4. f (x) =3x-1/2x^2
5. f (x) = (3-x) (2x+1)
Решите уравнение f' (x) =0, если:
1. f (x) =3x-x^2
2. f (x) = (2-x) (x+3)
3. f (x) =1/x+5
4. f (x) =2x^3-3x^2
5. f (x) =14x-x^14