设函数f(x)在x=0的某领域内连续,且f(0)=0,lim(x---0) f(x)/(1-cosx) =2 ,问f（x

设函数f(x)连续,lim((f(x)/x)-1/x-(sinx/x^2))=2,f(0)=? 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 ‘’ 设函数f(x)有二姐连续导数,且(x->0)lim[f(x)-a]/[e^x^2-1]=0,(x->0)lim[f ‘’ 设f(0)=0,f'(x)在x=0的领域内连续,又f'(x)≠0证明：lim(x趋向0)x^f(x)=1 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`（ 高数题：f(x)在x=0的某领域内连续,且f(0)=0,又x趋向0时f(x)/(10cosx)的极限=2,则x=0处（ 设f(x)在x=0连续,且lim(x+sinx)/ln[f(x)+2]=1x趋近于0,则f'(0)? 设函数f(x)有连续的二阶导数,且f '(0)=0,x趋近于0时,lim f ''(x)/|x|=1, 设f(x)导数在【-1,1】上连续,且f(0)=1,计算∫【f（cosx）cosx-f‘（cosx）sin^2x】dx（ f(x)是定义在(0,+∞)上的连续可微函数,且lim(x->+∞)(f(x)+f ' (x))=0,证明lim(x-> 设f(x)在x=0处连续,且lim(x趋于0）f(x)/x^2=1 ,证明函数f(x)在x=0处可导且取得极小值. 设f(x)在x=0处连续,且lim(x趋于0)f(x)/x存在,证明,f(x)在x=0处可导