2021年全国硕士研究生招生考试《经济类联考综合能力》真题及解析

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A 3 B <img width="16" height="29" src="https://www.beizhujiaoyu.com/uploads/202208/20211222221901_6622.jpg" title="" align="" alt="" /> C 2 D 0 E 6

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A <img width="150" height="29" src="https://www.beizhujiaoyu.com/uploads/202208/20211222221903_8029.jpg" title="" align="" alt="" /> B f(x0)=2 C <img width="150" height="28" src="https://www.beizhujiaoyu.com/uploads/202208/20211222221903_9435.jpg" title="" align="" alt="" /> D f(x0)=1 E <img width="150" height="28" src="https://www.beizhujiaoyu.com/uploads/202208/20211222221905_9279.jpg" title="" align="" alt="" />

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A e B 1 C <img width="21" height="18" src="https://www.beizhujiaoyu.com/uploads/202208/20211222221908_0841.jpg" /> D 0 E e2

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设函数f(x)=ex-1+ax，g(x)=ln xb，h(x)=sinπx．当x趋向于1时，f(x)为g(x)的高阶无穷小，g(x)与h(x)是等价无穷小，则(

A a=π-1，b=-π B a=-1，b=-π C a=π-1，b=π D a=-1，b=π E a=1，b=π

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A 4 B 2 C 3 D 1 E 6

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已知直线y=kx是曲线y=ex的切线，则对应切点的坐标为( )

A (ke，eke) B (e，1) C (e，ee) D (1，e) E (k，ek)

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方程x5-5x+1=0的不同实根的个数为( )

A 4 B 2 C 3 D 1 E 5

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设函数y=y(x)由方程xcosy+y-2=0确定，则y'=( )

A <img width="84" height="40" src="https://www.beizhujiaoyu.com/uploads/202208/20211222221910_1936.jpg" /> B <img width="84" height="40" src="https://www.beizhujiaoyu.com/uploads/202208/20211222221910_3497.jpg" /> C <img width="86" height="45" src="https://www.beizhujiaoyu.com/uploads/202208/20211222221912_3029.jpg" /> D <img width="86" height="45" src="https://www.beizhujiaoyu.com/uploads/202208/20211222221912_4591.jpg" /> E <img width="84" height="46" src="https://www.beizhujiaoyu.com/uploads/202208/20211222221914_4279.jpg" />

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A <img width="60" height="12" src="https://www.beizhujiaoyu.com/uploads/202208/20211222221916_5528.jpg" title="" align="" alt="" /> B <img width="80" height="20" src="https://www.beizhujiaoyu.com/uploads/202208/20211222221916_7716.jpg" title="" align="" alt="" /> C <img width="80" height="19" src="https://www.beizhujiaoyu.com/uploads/202208/20211222221918_7716.jpg" title="" align="" alt="" /> D <img width="80" height="21" src="https://www.beizhujiaoyu.com/uploads/202208/20211222221918_9190.jpg" title="" align="" alt="" /> E <img width="60" height="13" src="https://www.beizhujiaoyu.com/uploads/202208/20211222221920_8832.jpg" title="" align="" alt="" />

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已知函数f(x)可导，且f(1)=1，f'(1)=2，设g(x)=f(f(1+3x))，则g'(0)=( )

A 6 B 3 C 4 D 2 E 12

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