Question

1.f(x)=(2x^3)/3 (x1),则f(x)在x=1处的：

Answer 1

1. B, 左导数存在,但是右侧不连续,故右导数不存在

2. f(x) = (x-1)(x+2) / [ |x| (x²+1)]

x = 0 是唯一间断点,也是唯一不可导的点.