9.设函数 (x)=ln (1+(x)^2), 则 lim _(xarrow 0)dfrac (f(3+2h)-f(3-h))(h)= __ .

16.若 (x)=ln (1+(x)^2), 则 lim _(harrow 0)dfrac (f(3)-f(3-h))(h)= __

设函数f(x)满足lim _(harrow 0)dfrac (1)(h)[ f(5-dfrac (1)(3)h)-f(5)] =2,则lim _(harrow

[题目]已知 (3)=2, 则 lim _(harrow 0)dfrac (f(3-h)-f(3))(2h)= __

设lim _(xarrow 0)dfrac (ln (1+x+dfrac {f(x))(x))}(x)=3，则lim _(xarrow 0)dfrac (ln

①,设f(x)是以2为周期的可导函数,且 lim _(xarrow 1)dfrac (f(2x-1)-2f(3-2x))(ln x)=3 则-|||-lim _

设 函数 f ( x ) 在 x = 0 处可导，且lim _(xarrow 0)dfrac (f(2x)-f(0))(ln (1+3x))=1，则f(0)=(

[题目]设函数f (x)在 x=0 处连续,且 lim _(harrow 0)dfrac (f({h)^2)}({h)^2}=1,-|||-则 ()-|||-

设函数 f(x) 在 x=0 处可导，则 lim_(h arrow 0) (f(2h)-f(-3h))/(h) = （ ）A. $ -f'(0) $B. $ f

若极限lim _(harrow 0)dfrac (f({x)_(0)+2h)-f((x)_(0))}(h)=dfrac (1)(2)，则导数值lim _(har

已知 lim _(xarrow 0)([ 1+x+dfrac {f(x))(x)] }^dfrac (1{x)}=(e)^3, 则 lim _(xarrow 0