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 (1)(x);-|||-(3) =sin dfrac (1)(x)+arcsin x;-|||-(4) =ln |sin x|.

求下列函数的导数 ( 1 ) =sin dfrac (1)(x)( 2 )=sin dfrac (1)(x)( 3 )=sin dfrac (1)(x)求下列函

求lim _(xarrow 0)(xsin dfrac (1)(x)+dfrac (1)(x)sin x)=求

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)(

2.求下列函数在指定点的导数:-|||-(1) (x)=xsin x+dfrac (1)(2)cos x ,x=π/4;-|||-(2) (x)=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

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

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 (

1.求下列函数的自然定义域:-|||-(1) =sqrt (3x+2);-|||-(3) =dfrac (1)(x)-sqrt (1-{x)^2};-|||-(