1.设曲线y=f(x)过原点,且该曲线在点(x,f(x))处的切线斜率为-2x,则lim[f(-2x)/x^2]2.设函数f(x)在区间[0,+∞)上存在二阶导数,且f'(x)

问题描述:

1.设曲线y=f(x)过原点,且该曲线在点(x,f(x))处的切线斜率为-2x,则lim[f(-2x)/x^2]
2.设函数f(x)在区间[0,+∞)上存在二阶导数,且f'(x)