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27考研数二笔记——到底什么时候才能用等价无穷小?

  • 2026-04-02 08:08:09
27考研数二笔记——到底什么时候才能用等价无穷小?
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【1年级青山区红钢城小学数学试卷】2024-2025学期下学期期中

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  1. CONNECT:[ UseTime:0.000527s ] mysql:host=127.0.0.1;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000952s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001220s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.001199s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000681s ]
  6. SELECT * FROM `set` [ RunTime:0.004048s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000664s ]
  8. SELECT * FROM `article` WHERE `id` = 468870 LIMIT 1 [ RunTime:0.006383s ]
  9. UPDATE `article` SET `lasttime` = 1775124782 WHERE `id` = 468870 [ RunTime:0.011428s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000294s ]
  11. SELECT * FROM `article` WHERE `id` < 468870 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.004167s ]
  12. SELECT * FROM `article` WHERE `id` > 468870 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.013616s ]
  13. SELECT * FROM `article` WHERE `id` < 468870 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.025985s ]
  14. SELECT * FROM `article` WHERE `id` < 468870 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.007847s ]
  15. SELECT * FROM `article` WHERE `id` < 468870 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.006680s ]
0.155019s