曲线y=xlnx在点(e，e)处法线的斜率为

A 2 B 1 C <img src="https://www.beizhujiaoyu.com/uploads/202208/164678993929191.png" width="15" height="31" />  D -2

A 低阶无穷小量 B 等价无穷小量 C 同阶但不等价无穷小量 D 高阶无穷小量

A 2 B 1 C <img src="https://www.beizhujiaoyu.com/uploads/202208/164678994896241.png" width="15" height="31" />  D -1

A e dx B -e^-1 dx C (1+e^-1)dx D (1-e^-1)dx

A sinx+C B cosx+C C -sinx+C D -cosx+C

A -2 B -1 C 1 D 2

A <img src="https://www.beizhujiaoyu.com/uploads/202208/1646789976261.png" width="16" height="32" />  B <img src="https://www.beizhujiaoyu.com/uploads/202208/164678998078781.png" width="15" height="32" />  C <img src="https://www.beizhujiaoyu.com/uploads/202208/164678998468321.png" width="34" height="32" />  D <img src="https://www.beizhujiaoyu.com/uploads/202208/164678998843061.png" width="34" height="32" /> 

A <img src="https://www.beizhujiaoyu.com/uploads/202208/164678999721261.png" width="95" height="33" />  B <img src="https://www.beizhujiaoyu.com/uploads/202208/164679000795291.png" width="48" height="34" />  C 5y⁴ D 5y⁴+arctanx

A -e2x-y B e2x-y C -2e2x-y D 2e2x-y