求下列函数在指定范围上满足罗尔定理的点

1
f'(x)=x^2-3*x=0
===>
x=0 or 3
2
f'(x)=(2*x*(x^2 - 1))/(x^2 + 1)^2 - (2*x)/(x^2 + 1)=0
===>
x=0
偶个人为小姑娘应该多看看书啦~