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

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

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曲线y=xlnx在点（e，e）处法线的斜率为

A -2 B <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251011/19088389_0.png">? C <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251011/19088389_0_1.png">? D 2

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当x→0时，tanx2为x的

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

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

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

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A -2 B -1 C 1 D 2

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A A B B C C D D E E

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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

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

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