设 f(x) 在 x=0 的某邻域内连续，且lim_(x to 0) (f(x))/(x(1-cos x)) = -1，则 x=0 ( )

已知f(x)在 x=0 的某个邻域内连续,且 lim _(xarrow 0)dfrac (f(x))(1-cos x)=2, 则在点 x=0 处f(x )f(x

已知函数f(x,y)在点(0,0)的某个邻域内连续，且lim_(x to 0 cdot y to 0) (f(x,y))/(1-cos(x^2)+y^(2))=

[题目]已知f(x)在 x=0 的某个邻域内连续,且-|||-(0)=0, lim _(xarrow 0)dfrac (f(x))(1-cos x)=2, 则在

4.设f(x),g(x)在x=0的某个邻域内连续,且lim_(xto0)(g(x))/(x)=-1,lim_(xto0)(f(x))/(g^2)(x)=2,则在

设 F(x) = int_(0)^x tf(x^2-t^2) , dt, f(x) 在 x=0 某邻域内可导，且 f(0)=0, f(0)=1，则 lim_(x

设 f(x) 在 x=1 连续，且 f(1)=3，则 lim_(x to 1) f(x)=（ ）A. -3B. 0C. 3D. 1

1 设lim_(xto0)(1+x+(f(x))/(x))^(1)/(x)=e^3,则lim_(xto0)(1+(f(x))/(x))^(1)/(x)=____

设lim_(x to 0) (sin 2x + xf(x))/(x^3) = 1，则lim_(x to 0) (2cos x + f(x))/(x^2) = (

8.设lim_(x to 0) (sin 2x + xf(x))/(x^3) = 1,则lim_(x to 0) (2cos x + f(x))/(x^2) =

已知f(x)在x=0的某个邻域内连续，且f(0)=0.underset(lim)(x→0)(f(x))/(1-cosx)=2．则在点x=0处f(x)( )A.