[中學] x^4+x+2=0無實根
4
x + x +2 =0
明顯地
他不會有正根
怎麼說明他不會有負根
任何負的實數代入皆不等於零
而且會恆正
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 114.43.30.56
推
09/07 10:04, , 1F
09/07 10:04, 1F
推
09/07 10:04, , 2F
09/07 10:04, 2F
推
09/07 10:05, , 3F
09/07 10:05, 3F
推
09/07 10:12, , 4F
09/07 10:12, 4F
推
09/07 10:18, , 5F
09/07 10:18, 5F
推
09/07 10:31, , 6F
09/07 10:31, 6F
→
09/07 11:10, , 7F
09/07 11:10, 7F
→
09/07 11:16, , 8F
09/07 11:16, 8F
→
09/07 11:26, , 9F
09/07 11:26, 9F
推
09/07 11:50, , 10F
09/07 11:50, 10F
推
09/07 17:03, , 11F
09/07 17:03, 11F
→
08/13 17:04, , 12F
08/13 17:04, 12F
→
09/17 14:59, , 13F
09/17 14:59, 13F
討論串 (同標題文章)