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【课件分享】林志涵:北师大版九年级《一元二次方程根与系数的关系》课例分享

  • 2026-10-01 03:49:38
【课件分享】林志涵:北师大版九年级《一元二次方程根与系数的关系》课例分享

一元二次方程根与系数的关系

— 课件分享 —

01

教师简介

林志涵——佛山市顺德区容桂外国语高黎学校

初中数学二级教师，现就职于容桂外国语高黎学校，曾获佛山市初中数学“命题品题评题”比赛二等奖、顺德区“与数同行”展评活动一等奖、容桂街道优秀班主任等。

02

讲座课件分享

编辑：邓敏仪

审核：邱志刚

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  1. CONNECT:[ UseTime:0.000771s ] mysql:host=172.18.0.4;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000838s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000452s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000383s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000586s ]
  6. SELECT * FROM `set` [ RunTime:0.000351s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000665s ]
  8. SELECT * FROM `article` WHERE `id` = 532012 LIMIT 1 [ RunTime:0.000392s ]
  9. UPDATE `article` SET `lasttime` = 1790957014 WHERE `id` = 532012 [ RunTime:0.001345s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000358s ]
  11. SELECT * FROM `article` WHERE `id` < 532012 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000682s ]
  12. SELECT * FROM `article` WHERE `id` > 532012 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000428s ]
  13. SELECT * FROM `article` WHERE `id` < 532012 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000512s ]
  14. SELECT * FROM `article` WHERE `id` < 532012 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000641s ]
  15. SELECT * FROM `article` WHERE `id` < 532012 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000483s ]
0.083844s