二、填空题-|||-11、设 =sin (x)^2+2x ,则 dy= __ .-|||-12、已知 ^lim _(xarrow 0x)=xln x,(ngeqslant 3,nin N) ,则 y=" __-|||-_-|||-13、已知过曲线 =4-(x)^2 上点P的切线平行于直线 https:/img.zuoyebang.cc/zyb_4ad6fc691ed91a3570a194b6fafd5575.jpg=x ,则切点P的坐标为-|||-14.已知 f(1)=2 ,则 lim _(xarrow 1)dfrac (f(x)-f(1))({x)^2+x-2}= __-|||-15.设 =a(agt 0且aneq 1) ,则 https:/img.zuoyebang.cc/zyb_4ad6fc691ed91a3570a194b6fafd5575.jpg^n= __-|||-16.曲线 y=(x-1) 的拐点是 __-|||-17.设函数f(x)在x-处可导,则 lim _(Delta xarrow 1)dfrac (f({x)_(1)+Delta x)-f((x)_(1)-Delta x)}(Delta x)= __-|||-f(x)= { = __-|||-___

填空题.lim _(xarrow 0)dfrac (arcsin 2x)(sin 2x)=填空题.

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

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

12.设y=(x)/(1+x^2)，则dy|_(x=0)=_.12.设$y=\frac{x}{1+x^{2}}$，则$dy|_{x=0}=\_.$

[单选题]设y=sin(x-2)，则dy=().A.-cosxdxB.cosxdxC.-cos(x-2)dxD.cos(x-2)dx

[单选题]设y=sin(x-2)，则dy=().A.-cosxdxB.cosxdxC.-cos(x-2)dxD.cos(x-2)dx

[单选题]设y=sin(x-2)，则dy=().A.-cosxdxB.cosxdxC.-cos(x-2)dxD.cos(x-2)dx

20.填空题已知X~t(n)，则X^2~____.20.填空题已知X~t(n)，则X$^{2}$~____.

求：lim _(xarrow 0)dfrac (4{x)^3-2(x)^2+x}(3{x)^2+2x}-|||-__求：

(11) lim _(xarrow 0)((dfrac {sin x)(x))}^dfrac (1{{x)^2}}