题目
6、单选-|||-f'(x0)存在,则下列结果正确的是-|||-(4分)-|||-A .lim _(harrow 0)dfrac (f({x)_(0)+5h)-f((x)_(0)+2h)}(h)=f'((x)_(0))-|||-B .lim _(harrow 0)dfrac (f({x)_(0)+h)-f((x)_(0)-h)}(h)=2f'((x)_(0)) .-|||-C .lim _(harrow 0)dfrac (f({x)_(0)+3h)-f((x)_(0))}(h)=f'((x)_(0))-|||-D lim _(harrow 0)dfrac (f({x)_(0)+2h)-f((x)_(0)+3h)}(h)=f'((x)_(0))
题目解答
答案
D. $\lim _{h\rightarrow 0}\dfrac {f({x}_{0}+2h)-f({x}_{0}+3h)}{h}=f'({x}_{0})$