0)(f(1)-f(1-2h))/h= ( )

网友回答

lim_(h->0)(f(1)-f(1-2h))/h
=lim_(h->0)2*(f(1)-f(1-2h))/2h
=2*lim_(h->0)(f(1)-f(1-2h))/2h
=2*f'(1)=2*3=6
======以下答案可供参考======
供参考答案1:
lim_(h->0)(f(1)-f(1-2h))/h
=2lim_(h->0)(f(1)-f(1-2h))/2h
=2f'(1)
=6供参考答案2:
6