13.函数(x)=xsin ((x)^2+1)的一个原函数(x)=xsin ((x)^2+1).A.(x)=xsin ((x)^2+1)B.(x)=xsin ((x)^2+1)C.(x)=xsin ((x)^2+1)D.(x)=xsin ((x)^2+1)

lim _(xarrow infty )xsin dfrac (2x)({x)^2+1}=________.________.

(3) lim _(xarrow infty )xsin dfrac (x)(2{x)^2+1} ,

2、 设 =(e)^xsin ((x)^2+1) ,则 dy=

求下列函数的微分:-|||-(1) =dfrac (1)(x)+2sqrt (x);-|||-(2) =xsin 2x;-|||-(3) =dfrac (x)(

求下列函数的微分:-|||-(1) =dfrac (1)(x)+2sqrt (x);-|||-(2) =xsin 2x;-|||-(3) =dfrac (x)(

[题目]极限 lim _(xarrow infty )xsin dfrac (2x)({x)^2+1}= __

12.下列函数在定义域内是否有界?为什么?-|||-(1) =dfrac (xsin x)({x)^2+1};-|||-(2) =sin xsin dfrac

3.求下列函数的微分:-|||-(1) =dfrac (1)(x)+2sqrt (x);-|||-(2) =xsin 2x;-|||-(3) =dfrac (x

3.求下列函数的微分:-|||-(1) =dfrac (1)(x)+2sqrt (x) =-|||-(2) =xsin 2x ;-|||-(3) =dfrac

函数(x)=(({x)^2+1)}^2,则(x)=(({x)^2+1)}^2(x)=(({x)^2+1)}^2函数,则