曲线y=xlnx在点（e，e）处法线的斜率为

A 2 B 1 C <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251011/19088385_0_1.png"> D -2

A 2 B 1 C <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251011/19088387_0_1.png">? D -1

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 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 A B B C C D D E E

A <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251011/19088393_0_1.png">? B <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251011/19088393_0_2.png">? C 5y4 D 5y4+arctanx

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