设f(0)=0且f'(0)=2,求limx→0f(x)/sin2x

设f(0)=0且f'(0)=2,求limx→0f(x)/sin2x 设f(x)=|x|/x,求limx→0-f(x)及limx→0+f(x),并判断limx→0f(x)是否存在 设f(0)=0,且f'(0)=2,求limx趋向于0 f(x)/sin6x. 设函数f(x)=1+sin2x,求f'(0) 设函数f(x)在x=0点连续 且满足limx->0(sinx/x^2+f(x)/x)=2求f'(0) 设F（x）为f(x)的原函数,当x≥0时,有f(x)F(x)=(sin2x)^2,且F(0)=1,F(x)≥0,求f(x 设f(x)在x=0处连续,且limx->0f(x)-1/x=a(a为常数),求f(0),f'(0) 设f(0)=0 且f'(0)存在 则limx趋向与0f(x)/x= 设f(x)有二阶连续导数且f’(x)=0,limx—0 f’’(x) / [x] =1 为什么f(0)是f(x)的极小值 设函数f(x)=sin2x+sintcosx+1,且f(0)9/5.(1),若t为钝角,求f(t).(2)若t为锐角且恰 设F(x)的导数=f(x),当x》0时,有f(x)F(x)=sin2x的平方,且F(0)=1 , F(X)》0,求f(x 高数洛必达问题已知f（1）′=7,求limx→0（f（cosx）-f（1-x））/sin2x为何不能直接用洛必达求解