设x→0,limf(x)/x=0,f''(0)=4,证明:x→0,limf(x)/x^2=2
设limf(x)=0请证明limf(x)sinx=0 x→x0 x→x0
当 x->0 若 limf(x)=0 且 lim(f(2x)-f(x))/x=0 证明:limf(x)/x=0
设函数f(x-1)=x^2+2x-4,则limf(x)=?(x->0 )
设f'(x)=e^(-x^2),limf(x)=0,求∫(0,+∞)x^2*f(x)dx
已知limx/f(4x)=1,求limf(2x)/x x趋近0
设limf(x)=A,且A>0,证明lim根号f(x)=根号A
设f(x)在区间(-∞,+∞)内单调增加,limf(x)=1(x→0),证明f(x)在x=0处连续
如果函数f(x)在(a,+∞)内可导,且limf(x)存在,证明:limf'(x)=0
当x趋向于0时,limf(x)/x=1,且f‘’(x)>0,证明:f(x)>=x
设f(0)=0,f'(0)=2,求limf(x)/sin 2x ,x 趋向于0
设f(x)=当x0时为arccot-2/(x^2),求lim f(x) x->0-,lim f(x)x->0+,limf
已知f(x)在x=0连续且limf(3x)/2x=4 x→0,则f(0)=_____,f(0)'=_____