按导数定义求,
f'(0)=lim[(f(0+a)-f(0))/a] (其中a趋向于0)
=a(a-1)(a-2)(a-3)(a-4)/a的极限
=(a-1)(a-2)(a-3)(a-4)的极限,其中a趋向于0
=(-1)(-2)(-3)(-4)
=24
按导数定义求,
f'(0)=lim[(f(0+a)-f(0))/a] (其中a趋向于0)
=a(a-1)(a-2)(a-3)(a-4)/a的极限
=(a-1)(a-2)(a-3)(a-4)的极限,其中a趋向于0
=(-1)(-2)(-3)(-4)
=24