• 2022-11-04
    求函数[tex=9.571x1.571]apbD0nRmlcdVZi5bj1fGfFnEk1XQpWZJehT+sYItVd4Fk+oX14reG5d1J4e3R4/9[/tex][tex=5.786x2.5]YHwiPugA06KcPVx+cUYIeakNgu/KTr77Yx6QhGSIqgg3vawn9kNKnqpPK/mfQ4AQ[/tex]的极值。
  • 解:令[tex=11.643x5.786]fnpmC2J6JmQBLyo5NmGAz4E0Euk8PS2gzfiasHn2EfSjN6e9tpuhXWkTmMrl+lBvFeGZQf5XcpdzMKzAGuahVgJGyg+E4V4fybQtk7IHGl73GHqdV+FzZQe3VVSPME4Zd9emLx3285M8xwvGdQgOc+gXc1nS0Y6SAS3y0DOLgu/Nx1JJ3DNSGHdarezr30TJZa+H2MfaCqi858OLs5Ja+A==[/tex],得驻点 [tex=2.286x1.357]/B4OpizC+GWNmgu3h9VMGQ==[/tex],[tex=2.286x1.357]aSUWpQPXO/S4MIevdZvOIA==[/tex],[tex=3.143x1.571]NstDwX0TwsYkk40neUnhCw==[/tex],[tex=3.929x1.571]xPiYL/oNTHzEtmnWZw+CcA==[/tex],则[tex=11.714x3.0]PTfJE7px3R+W0oOweADpvZen2RmXyLxR/SzvkT/MZ+/preZ2ENZ9COd8psaPk4+/clhE4hfA6Vj9+Dklv7FIyuQn+oOWN2BvyIkfOGzuGcLVszyK7DuqDx11hMCOcVPd40la0JilfvTCqVWdGIfLqQ==[/tex],[tex=8.857x2.714]RKOtBDy2q4LuwJ8lQHFDVHE3HqXZEaJRzW5FAVdca+5tAEyXFhCuTAI5DMqqfwL0sqaSJzqgErd4vznKxGKWivYZ2Z4gc5pXtO6u4DtW5xg=[/tex],[tex=11.071x3.0]pGH3lXOFw6kH2OnYuOnTpHjkpbNTshpipXz/CiDDlgshrxHd5SmcnDlDD58la29C0KFqiZgsxjrxrlyRVaJkvVJKLJ6cjZCc1cOmDM6WXcqD+L47NnITgt14f1UCLQIECIz5CpEbNaYVMt6CfPK35w==[/tex].(1)在[tex=2.286x1.357]/B4OpizC+GWNmgu3h9VMGQ==[/tex]处,[tex=3.929x1.071]0U8RJ5vQe+0OuPms4Rwctg==[/tex],[tex=2.071x1.0]mKMzRM08Az0BU9t4FQ4ITg==[/tex],[tex=3.0x1.357]SjE4S2onhn0fWloKtOQQew==[/tex],[tex=7.357x1.357]AU4sp4O2cMxtq8aIwv7OgA==[/tex],是极小值点,极小值[tex=4.0x1.357]x9K9XRX66b5NfWur+zNFeA==[/tex].(2)在[tex=2.286x1.357]aSUWpQPXO/S4MIevdZvOIA==[/tex]处,[tex=5.571x2.357]uG3NwaGTcnDpuolBs59Q1GXn4ELUBgkgwoS0oVBrsWk=[/tex],[tex=2.071x1.0]mKMzRM08Az0BU9t4FQ4ITg==[/tex],[tex=3.714x2.357]OUueYXzmj+k1MbJkLpFozw==[/tex],[tex=5.286x1.357]0cWcQt1+a/Exe/lAKPqXvA==[/tex],是极大值点,极大值[tex=7.357x2.357]g23f1BL6yT1IQD8FdP4u/l8Yd6hC5BkqovXPTw+kBMg=[/tex].(3)在[tex=3.143x1.571]NstDwX0TwsYkk40neUnhCw==[/tex]处,[tex=2.5x2.357]1jAEqn4Us43LOCHlfodobQ==[/tex],[tex=2.071x1.0]mKMzRM08Az0BU9t4FQ4ITg==[/tex],[tex=3.214x2.357]l1Cb2xLgsHG1fHEi0iPTxg==[/tex],[tex=5.286x1.357]Sgbtupy9PX2xS5TfUr5xTA==[/tex],不是极值点。(4)在[tex=3.929x1.571]xPiYL/oNTHzEtmnWZw+CcA==[/tex]处,[tex=2.5x2.357]1jAEqn4Us43LOCHlfodobQ==[/tex],[tex=2.071x1.0]mKMzRM08Az0BU9t4FQ4ITg==[/tex],[tex=3.214x2.357]l1Cb2xLgsHG1fHEi0iPTxg==[/tex],[tex=5.286x1.357]Sgbtupy9PX2xS5TfUr5xTA==[/tex],不是极值点。

    举一反三

    内容

    • 0

      A=[1 2 3 4 5 6 7 8 9]A(5)=[]A=1 4 7 5 8 3 6 9

    • 1

      求不定积分[img=115x46]17da65382f8e1b9.png[/img]; ( ) A: x - (5*log(x + 1))/4 - (3*log(x - 3)) B: (5*log(x + 1))/4 - (3*log(x - 3)) C: x - (5*log(x + 1))/4 - (3*log(x - 3))/4 D: (5*log(x + 1))/4 - (3*log(x - 3))/4

    • 2

      【单选题】Which of the following matrices does not have the same determinant of matrix B: [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -1, 0, -9,-5] A. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 0; -1, 0, -9, -5] B. [1, 3, 0, 2; -2, -5, 7, 4; 1, 0, 9, 5; -1, 0, -9, -5] C. [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -3, -5, -2, -1] D. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 1; -1, 0, -9, -5]

    • 3

      【阅读理解(选择)/完型填空】基于以下描述回答 1-2 题: 下表是 9 名评委对 10 名学生的毕业设计进行等级评定结果: 评委 A B C D E F G H I J 1 1 2 4 3 9 6 5 8 7 10 2 1 4 2 5 6 7 3 10 8 9 3 1 3 4 5 2 8 9 6 10 7 4 1 3 4 5 2 6 10 8 7 9 5 1 9 2 5 6 3 4 8 10 7 6 1 4 9 2 5 6 7 3 10 8 7 1 3 5 10 2 6 9 7 8 4 8 1 3 5 7 6 4 8 10 2 9 9 1 2 8 4 9 6 3 7 5 10

    • 4

      有代码片段:function f(y) {var x=y*y;return x;} for(var x=0;x< 5;x++) {y=f(x);document.writeln(y);}输出结果是( )。 A: 0 1 2 3 4 B: 0 1 4 9 16 C: 0 1 4 9 16 25 D: 0 1 2 3 4 5