1.lim(x→0)[(1/x^2)-(1/xsinx)] 2.lim(x→0) [(1/e^x -1)-(1/x)] 3.lim(x→0) [(1/x-1)-(2/x^2 -1)]4.f'(x)=k,求 lim(x→0)[(f(x0+2x)-f(x0-x))/x] 5.f(x)={x^3sin(1/x),x不等于0,0,x=0 ,则f'(0)=?6.y=3^x,求y^(100)(0) 7.y=x^2arctanx,求dy,y'',8.y=(x

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/22 15:59:08
1.lim(x→0)[(1/x^2)-(1/xsinx)]2.lim(x→0)[(1/e^x-1)-(1/x)]3.lim(x→0)[(1/x-1)-(2/x^2-1)]4.f''(x)=k,求lim(

1.lim(x→0)[(1/x^2)-(1/xsinx)] 2.lim(x→0) [(1/e^x -1)-(1/x)] 3.lim(x→0) [(1/x-1)-(2/x^2 -1)]4.f'(x)=k,求 lim(x→0)[(f(x0+2x)-f(x0-x))/x] 5.f(x)={x^3sin(1/x),x不等于0,0,x=0 ,则f'(0)=?6.y=3^x,求y^(100)(0) 7.y=x^2arctanx,求dy,y'',8.y=(x
1.lim(x→0)[(1/x^2)-(1/xsinx)] 2.lim(x→0) [(1/e^x -1)-(1/x)] 3.lim(x→0) [(1/x-1)-(2/x^2 -1)]
4.f'(x)=k,求 lim(x→0)[(f(x0+2x)-f(x0-x))/x] 5.f(x)={x^3sin(1/x),x不等于0,0,x=0 ,则f'(0)=?6.y=3^x,求y^(100)(0) 7.y=x^2arctanx,求dy,y'',8.y=(x+1)e^((x^2)+1),求dy,y''

1.lim(x→0)[(1/x^2)-(1/xsinx)] 2.lim(x→0) [(1/e^x -1)-(1/x)] 3.lim(x→0) [(1/x-1)-(2/x^2 -1)]4.f'(x)=k,求 lim(x→0)[(f(x0+2x)-f(x0-x))/x] 5.f(x)={x^3sin(1/x),x不等于0,0,x=0 ,则f'(0)=?6.y=3^x,求y^(100)(0) 7.y=x^2arctanx,求dy,y'',8.y=(x
题目太多了,没人做滴的.我来选1个做一下:
lim(x→0)[(1/x^2)-(1/xsinx)]
1/x^2-1/xsinx =(sinx-x)/x^2*sinx
分子分母求导数 (cosx-1)/(2xsinx+x^2*cosx)
还是0/0型,再一次分子分母求导数
-sinx/(2sinx+2xcosx+2xcosx-x^2*sinx)
再求导
-cosx/(2cosx+4cosx-4xsinx-2xsinx-x^2*cosx)
x→0
=-1/(2+4)
=-1/6