若lim _(xarrow 0)dfrac (sin x)({e)^x-a}(cos x-b)=5，则a=(),b=()

lim _(xarrow a)dfrac (sin x-sin a)(x-a)。。

(5) lim _(xarrow 0)dfrac ({x)^2cos dfrac (1)(x)}(sin x) ,

lim _(xarrow 0)dfrac (x)(x+sin x)=（）。A.2B.1C.lim _(xarrow 0)dfrac (x)(x+sin x)=D

设 (x)=dfrac ({e)^x-b}((x-a)(x-b)) 有无穷间断点 =e, 可去间断点 =1, 则 (a,b)= __

lim _(xarrow 0)dfrac ({e)^x-(e)^sin x}(x-sin x)..

lim _(xarrow 0)dfrac ({e)^x-(e)^-x}(sin x)=()-|||-__。。

(B)若 lim _(xarrow 0)dfrac (f(x)+f(-x))(x) 存在,则 (0)=0.-|||-(C)若 lim _(xarrow 0)df

lim _(xarrow 0)dfrac ({x)^2sin dfrac (1)(x)}(tan x)=A.0B.1C.lim _(xarrow 0)dfrac

(6) lim _(xarrow a)dfrac ({sin )^2x-(sin )^2a}(x-a).

若lim _(xarrow 0)dfrac ({(1+a{x)^2)}^sin x-1}({x)^3}=6-|||-__，则lim _(xarrow 0)dfr