如何求抛物线的切线

页面:/news/view-1351693/ | 耗时:0.9914 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=1351693 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1351693 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1351693 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1063799,1096338,1108496,1095888,1100495,1090396,1095520,1087926,1063395,1069335,1081859,1092289,1092642,1108640,1074824,905945,1100215,1128597,1061328,1066924,1113762,1058958,1093266,1105795,1101945,1065049,1088605,1094015,1065749,1070967) ORDER BY field (ArticleID,1063799,1096338,1108496,1095888,1100495,1090396,1095520,1087926,1063395,1069335,1081859,1092289,1092642,1108640,1074824,905945,1100215,1128597,1061328,1066924,1113762,1058958,1093266,1105795,1101945,1065049,1088605,1094015,1065749,1070967)