±±¾©Ê¯ÓÍ»¯¹¤Ñ§Ôº2026ÄêÑо¿ÉúÕÐÉú½ÓÊÕµ÷¼Á¹«¸æ
²é¿´: 457  |  »Ø¸´: 4

óÝóÝÈÕÉÏ

Òø³æ (ÖøÃûдÊÖ)

[ÇóÖú] ½âµÄÎÊÌâ

ʵÊýÄÚµÄÈý´Î²»¿ÉÔ¼¶àÏîʽ£¬ÈçX^3-21x+20£¬¿ÉÒÔÓëxÖáÓÐÈý¸ö½»µã£¬±íÃ÷ËüÓÐ3¸öʵÁãµã£¬µ«Èç¹ûÓù«Ê½Çó½â£¬ÇÒ²»ÔÊÐíʹÓø´Êý£¬ÔòûÓÐʵÊý½â£¬ÎªÊ²Ã´£¡
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

óÝóÝÈÕÉÏ

Òø³æ (ÖøÃûдÊÖ)

Õâ¸öÎÊÌâÖµ²»ÖµµÃÎÊ
2Â¥2012-03-08 21:35:53
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

shumolynu

½ð³æ (ÕýʽдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
СÓêÃÈÃÈ(½ð±Ò+1): ллŶ~ 2012-03-10 11:20:37
ÒòΪʵÊý¿ÉÒÔÓø´ÊýÀ´±íʾ£¬·½³ÌµÄʵÊý½âÊÇÓø´Êý±íʾµÄ£¬µ«»¹ÊÇʵÊý½â
3Â¥2012-03-09 09:06:56
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

dzyk2003

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
óÝóÝÈÕÉÏ(½ð±Ò+10): 2012-03-09 20:40:43
ÏȻشðÂ¥Ö÷µÄÎÊÌ⣬ÔÚÊµ×ø±êϵÖеĺ¯Êý£¬Í¬XÖáÓÐÈý¸ö½»µãµÄº¯Êý£¬ÆäֵΪ0µÄ·½³Ì¾Í´æÔÚ3¸öʵÊý½â£¬Õâ¸öÊÇûÓÐÎÊÌâµÄ¡£
ÏÂÃæµÄÎÊÌâÊÇÕâ3¸öʵÊý½âÈçºÎ±íʾ£¬¹«Ê½·¨ÀïÃæ³öÏֵĸ´Êýµ¥Î»ÊÇÔÚÌ×Óù«Ê½Ê±Ðγɣ¬ÖÁÓÚÈçºÎÈ¥µôÕâ¸ö·ûºÅ£¬¾ÍÒªÃ÷°×Õâ¸ö¹«Ê½ÊÇÈçºÎ³öÀ´µÄ¡£»¹ÓоÍÈç¶þÂ¥Ëù˵£¬ÊµÊýÊǸ´ÊýµÄÒ»²¿·Ö£¬¿ÉÒÔÓø´Êý±íʾ¡£
Â¥Ö÷µÄ˼ά´æÔÚÒ»¸öÂß¼­´íÎ󣬾ÍÊÇû·¨±íʾ²¢²»´ú±í²»´æÔÚ¡£
4Â¥2012-03-09 12:10:51
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

1314168apple

½ð³æ (ÖªÃû×÷¼Ò)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
СÓêÃÈÃÈ(½ð±Ò+2): лл¹Ø×¢~ 2012-03-10 11:20:54
matlab
solve('x^3-21*x+20')

ans =
[ -5]
[  1]
[  4]
µ«Èç¹ûÓù«Ê½Çó½â£¬ÇÒ²»ÔÊÐíʹÓø´Êý£¿£¿

×Ô¼ºÒòʽ·Ö½â ¾Í¿ÉÒÔ  '£¨x^3-x£©-£¨20x-20£©
ΪÁË×îÖÕÀí½âÄãËù²»Àí½âµÄ£¬Äã±ØÐë¾­ÀúÒ»ÌõÓÞÃÁÎÞÖªµÄµÀ·¡£ÎªÁËÕ¼ÓÐÄã´ÓδռÓеĶ«Î÷£¬Äã±ØÐë¾­Àú±»°þ¶áµÄµÀ·¡£ÎªÁË´ïµ½ÄãÏÖÔÚËù²»ÔÚµÄÃû룬Äã±ØÐë¾­ÀúÄÇ...
5Â¥2012-03-09 18:44:33
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ óÝóÝÈÕÉÏ µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] ÉúÎïѧѧ˶£¬Ò»Ö¾Ô¸ºþÄÏ´óѧ£¬³õÊԳɼ¨338 +5 YYYYYNNNNN 2026-03-26 6/300 2026-03-28 17:50 by ¿ñìÅÂóµ±µ±
[¿¼ÑÐ] ±¾¿ÆÐÂÄÜÔ´¿ÆÑ§Ó빤³Ì£¬Ò»Ö¾Ô¸»ªÀíÄܶ¯285Çóµ÷¼Á +3 AZMK 2026-03-27 5/250 2026-03-28 16:19 by xxxsssccc
[¿¼ÑÐ] 312£¬ÉúÎïѧÇóµ÷¼Á +3 СÒëͬѧabc 2026-03-28 3/150 2026-03-28 15:32 by ÂäÉ˼
[¿¼ÑÐ] »¯Ñ§0703 µ÷¼Á 306·Ö Ò»Ö¾Ô¸211 +4 26ÒªÉϰ¶ 2026-03-28 4/200 2026-03-28 15:30 by 1018329917
[¿¼ÑÐ] 266·Ö£¬Çó²ÄÁÏÒ±½ðÄÜÔ´»¯¹¤µÈµ÷¼Á +7 ÍÛºôºßºôºß 2026-03-27 9/450 2026-03-28 12:22 by zllcz
[¿¼ÑÐ] Ò»Ö¾Ô¸Äϲý´óѧ324Çóµ÷¼Á +7 hanamiko 2026-03-27 7/350 2026-03-28 09:56 by ÀîÉϰ¶0921
[¿¼ÑÐ] 0703»¯Ñ§/290Çóµ÷¼Á/±¾¿Æ¾­Àú·á¸»/¹¤¿ÆÒ²¿É +9 µ¤ÇàÄÌ¸Ç 2026-03-26 10/500 2026-03-28 07:45 by barnett0632
[¿¼ÑÐ] ÕÅ·¼Ãú-Öйúũҵ´óѧ-»·¾³¹¤³Ìר˶-298 +4 ÊÖ»úÓû§ 2026-03-26 4/200 2026-03-28 07:17 by mmm just
[¿¼ÑÐ] 331»·¾³¿ÆÑ§Ó빤³ÌÇóµ÷¼Á +3 ìÚÈ»ºÃÔËÆø 2026-03-27 3/150 2026-03-28 04:11 by fmesaito
[¿¼ÑÐ] 08¿ªÍ·275Çóµ÷¼Á +4 À­Ë­²»ÖØÒª 2026-03-26 4/200 2026-03-27 14:12 by Delta2012
[¿¼ÑÐ] 316Çóµ÷¼Á +5 Pigcasso 2026-03-24 5/250 2026-03-27 12:10 by zhshch
[¿¼ÑÐ] 085602 289·ÖÇóµ÷¼Á +8 WWWÎ÷Î÷¸¥Ë¹ 2026-03-24 8/400 2026-03-26 16:33 by ²»³Ôô~µÄ؈
[¿¼ÑÐ] ´ò¹ýºÜ¶à¾ºÈü£¬085406¿ØÖƹ¤³Ì300·Ö£¬Çóµ÷¼Á +3 askeladz 2026-03-26 3/150 2026-03-26 09:08 by ¸øÄãÄã×¢ÒâÐÝÏ¢
[¿¼ÑÐ] 303Çóµ÷¼Á +6 À¶É½Ô 2026-03-25 6/300 2026-03-25 22:47 by 418490947
[¿¼ÑÐ] ÍøÂç¿Õ¼ä°²È«0839Õе÷¼Á +4 w320357296 2026-03-25 6/300 2026-03-25 17:59 by 255671
[¿¼ÑÐ] Çóµ÷¼Á +3 ÀîÀî²»·þÊä 2026-03-25 3/150 2026-03-25 13:03 by cmz0325
[¿¼ÑÐ] 0703»¯Ñ§µ÷¼Á£¬Çóµ¼Ê¦ÊÕ +7 ÌìÌìºÃÔËÀ´Éϰ¶° 2026-03-24 7/350 2026-03-24 20:26 by peike
[Óлú½»Á÷] ÓлúºÏ³ÉÇóÖú 20+3 FENGSHUJEI 2026-03-23 5/250 2026-03-24 19:31 by 88817753
[¿¼ÑÐ] 293Çóµ÷¼Á +3 ÌÎÌÎWjt 2026-03-22 5/250 2026-03-22 22:21 by jiangpengfei
[¿¼ÑÐ] Çóµ÷¼Á +5 Zhangbod 2026-03-21 7/350 2026-03-22 13:13 by Zhangbod
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û