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2026年上海高考数学试卷解析修订版

  • 2026-09-17 02:10:02
2026年上海高考数学试卷解析修订版
几天前已经发过试卷及评析（2026年上海高考数学试卷及评析），这次发的是修订版。
15题我今天早上洗澡时候，突然想到这个复数是在复平面的实轴对称的两侧，分别+i和-i就是继续往虚轴正负方向平移一个单位，自然虚部还是对称的，当然还要考虑这两个数本来虚部相等，那上下平移之后，虚部互为相反数，那开始相等的虚部只能是零。
第20题（3）解析重写补充了一遍，原来懒省事，用几何图形算的t的范围；
21题修改了（3）的一些表述，同时强调了零点存在定理不可用。
【2026上海高考试卷解析】
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试做成都中考数学试卷

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  1. CONNECT:[ UseTime:0.000516s ] mysql:host=172.18.0.4;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000913s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000373s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000371s ]
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  6. SELECT * FROM `set` [ RunTime:0.000293s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000848s ]
  8. SELECT * FROM `article` WHERE `id` = 503198 LIMIT 1 [ RunTime:0.000354s ]
  9. UPDATE `article` SET `lasttime` = 1790268459 WHERE `id` = 503198 [ RunTime:0.001728s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000352s ]
  11. SELECT * FROM `article` WHERE `id` < 503198 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000431s ]
  12. SELECT * FROM `article` WHERE `id` > 503198 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000387s ]
  13. SELECT * FROM `article` WHERE `id` < 503198 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000674s ]
  14. SELECT * FROM `article` WHERE `id` < 503198 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000771s ]
  15. SELECT * FROM `article` WHERE `id` < 503198 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000649s ]
0.080477s