题目

已知函数f(x)在 x=0 处二阶可导且-|||-lim _(xarrow 0)dfrac (f(x))({x)^3}=1 则下列说法中正确有几个() ()-|||-(1) lim _(xarrow 0)dfrac (f'(x))({x)^2}=3-|||-2) ''(0)=0-|||-3) lim _(xarrow 0)dfrac (f'(x))(x)=6-|||-4) ^m(0)=6A.1B.2C.3D.4


  • A.
    1
  • B.
    2
  • C.
    3
  • D.
    4

题目解答

答案

A. 1