Question

1.решить уравнение
2.решить неравенство

Answer 1

1. f(x) = 1/3x³+4x²-7

f'(x) = x²+8x

x²+8x = 0

x(x+8) = 0

x1 = 0, x2 = -8

2) f(x) = 2x²-8x

f'(x) = 4x-8

4x-8 < 0

4x < 8

x < 2