设f(x)有二阶导数,在x=0的某去心邻域内f(x)≠0,且lim f(x)/x=0,f'(0)=4,求lim (1+f

设f(x)有二阶导数,在x=0的某去心邻域内f(x)≠0,且lim f(x)/x=0,f'(0)=4,求lim (1+f 设f(x)在x=0的某一邻域内二阶可导,且lim(x-->0)f(x)/x=0,f''(0)=2.求lim(x-->0) 设f(x)在x=0的邻域内有三阶导数,且x->0时,lim(1+x+f(x)/x)^(1/x)=e^3.求（1）：f(0 设f(x)在x=0的邻域内具有二阶导数,且lim(x趋于0)(1+x+f(x)/x)^(1/x)=e^3 求lim（x→0）[(xf'(x))/(2f(x))]^(1/x),其中f(x)在x=0点某邻域内有三阶连续导数,f(0 设f(x)在x=0的某邻域内连续,且lim x→0 [xf(x)-ln(1+x)]/x^2=2,求f(0),并证明f`（ 设函数f(x)在点a的某邻域内二阶可导,且f’(a)≠0,求lim(x→a) [1/ f’(a)(x-a)- 1/ f( f(x)在x=0的某邻域内二阶可导,且lim (x->0) (sin3x/x^3 + f(x)/x^2) =0,求lim 设f(x)有二阶导数,且f''(X)>0,lim(x趋于0）f(x)/x=1 ..证明：当x>0时,有f(x)>x 设函数f(x)有二阶连续导数,且(x->0)lim[f(x)-a]/[e^x^2-1]=0,(x->0)lim[f ‘’ 设f(x)在x=0的某邻域内可导,且一介导数等于0,又lim一介导数/x=1则f(0)是否有极值?lim趋于0 高数 设f(x)具有连续的二阶导数,且lim[f(x)/x]=0,在x趋向于0的时候.且f’‘（x）=4,求lim[1+