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2023考研数学二真题_26.考研数学(一)(二)(三)真题_26.2考研数学(二)真题_版本2自选使用_01.1987-2024年数二真题合集

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2023考研数学二真题_26.考研数学(一)(二)(三)真题_26.2考研数学(二)真题_版本2自选使用_01.1987-2024年数二真题合集
2023考研数学二真题_26.考研数学(一)(二)(三)真题_26.2考研数学(二)真题_版本2自选使用_01.1987-2024年数二真题合集
2023考研数学二真题_26.考研数学(一)(二)(三)真题_26.2考研数学(二)真题_版本2自选使用_01.1987-2024年数二真题合集
2023考研数学二真题_26.考研数学(一)(二)(三)真题_26.2考研数学(二)真题_版本2自选使用_01.1987-2024年数二真题合集
2023考研数学二真题_26.考研数学(一)(二)(三)真题_26.2考研数学(二)真题_版本2自选使用_01.1987-2024年数二真题合集
2023考研数学二真题_26.考研数学(一)(二)(三)真题_26.2考研数学(二)真题_版本2自选使用_01.1987-2024年数二真题合集

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绝密★启用前 年全国硕士研究生招生考试 2023 数学(二) (科目代码:302) 考生注意事项 1. 答题前,考生须在试题册指定位置上填写考生编号和考生姓名;在答题卡指定 位置上填写报考单位、考生姓名和考生编号,并涂写考生编号信息点。 2. 选择题的答案必须涂写在答题卡相应题号的选项上,非选择题的答案必须书写 在答题卡指定位置的边框区域内。超出答题区域书写的答案无效;在草稿纸、 试题册上答题无效。 3. 填(书)写部分必须使用黑色字迹签字笔书写,字迹工整、笔迹清楚;涂写部分必 须使用2B铅笔填涂。 4. 考试结束,将答题卡和试题册按规定交回。 (以下信息考生必须认真填写) 考生编号 考生姓名一、选择题(1~10小题,每小题5分,共50分.下列每题给出的四个选项中,只有一个选项是最 符合题目要求的.) 1.曲线 、=zln(e + —L)的斜渐近线方程为( ). \ X — 1 ! A. J, = x + e B. = x + — e C. y =工 D. y = j:----— e ", ' ',, 工 < 0, 2.函数 y(x)=wi + x2 的一个原函数为( ). [(x + Deos x , x > 0 a Pz x fln(yi + x2 — x)., z W 0, A. F(x)= * (x + l)cos x — sin x , x > 0 (ln(\/l + x2 —x) + 1 > x 0, B. F(x)= '(x + l)cos x — sin x , x > 0 lln(\/l + x2 +z), z W 0, C・ F(z)= '(x + l)sin x + cos x , •z > 0 fln(5/l + x2 + x) + 1» •z < 0, D. F(x)= \(x + l)sin x + cos x, z > 0 3. 已知{z,} , {>„)满足:Xj =>! =y ,xn+1 =sin x„ ,>„+1 =就(71 =1,2,…),则当 n 时, ( ). A. x„是耻的高阶无穷小 B. ”是的高阶无穷小 C. 工”与勿是等价无穷小 D. x„与队是同阶但不等价的无穷小 4. 若微分方程y' + ay' +by=0的解在(一8,十8)上有界,则( ). A.g < 0,5 > 0 B・Q > 0/ > 0 C. q = 0> 0 D. a = 0 ,b V0 、 3 — 2t -\ t \ , 5. 设函数y —f(.x )由{ . 确定,则( ). =| t I sin t A. /(z)连续,/(0)不存在 B. /(0)存在,/(x)在* =0处不连续 C. f'(工)连续,/(0)不存在 D. f'(O)存在,/'(工)在z=0处不连续 1 r+8 6. 若函数f(a) = —— eLr在a —a0处取得最小值,则a0 = < ). ■> 2 x(ln x) 2023年数学(二)第1页(共14页)A, — ]「— B. — ln(ln 2) C・ D・ In 2 ln(ln 2) In L 7.设函数r(工)= &z+a)e',若r(z)没有极值点,但曲线v=r(z)有拐点,则a的取值范围 是( ). A. [0,1) B. [1,+8) C. [1,2) D. [2,+8) /A E\ * 8.设A,B为n阶可逆矩阵,E为”阶单位矩阵,M,为矩阵M的伴随矩阵,则 \。 =( ). A | B* -B* A* \ B・(1 A IB* -A B* O 1 B | A* / O 1 B |A・ B \A' -B' A" \ D.( I B IA- -AB# o 1 A IB' / \ O 1 A |B- 9.二次型 f(X] ,x2 »x3)=(工 i +x2) 2 +(□:! + x3)2 —4(x2 —x3)z 的规范形为( ). A. y\ +>2 B. — yl C. + jy; — D. y\ y}— y} 10.已知向量a i =[2) ,a2 = (lj =y(x)(x >e)经过点(e2,0) ,L上任一点P (工,丁)到、轴的距离等于该点处 的切线在V轴上的截距. (1) 求 y(x) i (2) 在L上求一点,使该点处的切线与两坐标轴所围三角形的面积最小,并求此最小面积. 18.(本题满分12分) j-2 求函数八了,、)=八5+3的极值. 2023年数学(二)第3页(共14页)19.(本题满分12分) 已知平面区域d=(工,:y)|o 1 I 1 X #1+工2 (1) 求D的面积; (2) 求D绕工轴旋转所成旋转体的体积. 20.(本题满分12分) 设平面有界区域D位于第一象限,由曲线x2+y2-xy=l,x2+y2-xy= 2与直线、= 4^x ,y =0 围成,计算『-.\— dxdy. % 3* +、 2023年数学(二)第4页(共14页)21.(本题满分12分) 设函数/(x)在[—a,a]上具有2阶连续导数.证明: (1) 若 /(0) =0,则存在 £ € (-a,a),使得 a (2) 若,&)在(一a,a)内取得极值,则存在7)e (一a,a),使得 1尸3)|2齐 I /(a)-/(-a) I. 22.(本题满分12分) /X 1 \ / X ! + X2 + x3 设矩阵A满足:对任意Xi ,x2 >X3均有A 12) = ( 211—12+13 •Z 3 1 2 一 % 3 ⑴求A; (2)求可逆矩阵P与对角矩阵A ,使得P_1AP =A. 2023年数学(二)第5页(共14页)
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  1. CONNECT:[ UseTime:0.000823s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001424s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000649s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000636s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001312s ]
  6. SELECT * FROM `set` [ RunTime:0.000522s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.001335s ]
  8. SELECT * FROM `wendang` WHERE `id` = 325051 LIMIT 1 [ RunTime:0.001124s ]
  9. UPDATE `wendang` SET `liulancishu` = 5 WHERE `id` = 325051 [ RunTime:0.001860s ]
  10. UPDATE `wendang` SET `lasttime` = 1772292197 WHERE `id` = 325051 [ RunTime:0.001092s ]
  11. SELECT * FROM `wendang` WHERE `id` < 325051 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001001s ]
  12. SELECT * FROM `wendang` WHERE `id` > 325051 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002485s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 325051 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001969s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 325051 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001955s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 325051 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001654s ]
0.191599s