Znn3bq.jpeg
ÉÇÍ·´óѧº£Ñó¿ÆÑ§½ÓÊܵ÷¼Á
²é¿´: 1716  |  »Ø¸´: 9
µ±Ç°Ö»ÏÔʾÂú×ãÖ¸¶¨Ìõ¼þµÄ»ØÌû£¬µã»÷ÕâÀï²é¿´±¾»°ÌâµÄËùÓлØÌû

boy2014

гæ (СÓÐÃûÆø)

[ÇóÖú] Ò»µÀ¸ßÊýÌ⣬Íû¸ßÊÖÖ¸µã¡£¡£¡£ ÒÑÓÐ2È˲ÎÓë

¾ÍÕâÌâ¡£
Ò»µÀ¸ßÊýÌ⣬Íû¸ßÊÖÖ¸µã¡£¡£¡£
ÎÞ±êÌâ.png
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

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

feixiaolin

ÈÙÓþ°æÖ÷ (ÎÄ̳¾«Ó¢)

ÓÅÐã°æÖ÷

ÒýÓûØÌû:
4Â¥: Originally posted by boy2014 at 2014-02-10 12:57:24
ÄÇinf¾ßÌåÊǹØÓÚxµÄʲô±í´ïÐÎÊ½ÄØ£¿...

inf  ÎÞȺ´ó ´úºÅ
7Â¥2014-02-10 22:28:12
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 10 ¸ö»Ø´ð

feixiaolin

ÈÙÓþ°æÖ÷ (ÎÄ̳¾«Ó¢)

ÓÅÐã°æÖ÷

sum[x^(n^2), {n, 0, inf}]ÊÇsum[x^n, {n, 0, inf}]µÄȱÏî¼¶Êý£»
ÔÚ|x|<1ʱÊÕÁ²£»x=1ʱ·¢É¢£»
x¡ú1-£¬¼´´Ó1µÄ×ó²à¡ú1ʱ£¬sum[x^(n^2), {n, 0, inf}]µÈ¼ÛÓÚinf£¬½áÂÛ³ÉÁ¢¡£

[ Last edited by feixiaolin on 2014-2-10 at 12:54 ]
2Â¥2014-02-10 12:31:24
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

boy2014

гæ (СÓÐÃûÆø)

¾ÍÊÇÕâÉÏÃæµÄÒ»µÀÌ⣬
Ê×½ìÖйú´óѧÉúÊýѧ¾ºÈüÊÔ¾í(2009Äê,·ÇÊýѧÀࣩ

http://muchong.com/bbs/viewthread.php?tid=4394003&fpage=1
3Â¥2014-02-10 12:41:23
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

boy2014

гæ (СÓÐÃûÆø)

ÒýÓûØÌû:
2Â¥: Originally posted by feixiaolin at 2014-02-10 12:31:24
sumÊÇsumµÄȱÏî¼¶Êý£»
ÔÚ|x|<1ʱÊÕÁ²£»x=1ʱ·¢É¢£»
x¡ú1-£¬¼´´Ó1µÄ×ó²à¡ú1ʱ£¬sumµÈ¼ÛÓÚinf£¬½áÂÛ³ÉÁ¢¡£
...

ÄÇinf¾ßÌåÊǹØÓÚxµÄʲô±í´ïÐÎÊ½ÄØ£¿
4Â¥2014-02-10 12:57:24
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] Ò»Ö¾Ô¸»¦9£¬326ÇóÉúÎïѧµ÷¼Á +7 Áõīī 2026-04-13 7/350 2026-04-13 17:23 by ss592599143
[¿¼ÑÐ] ²ÄÁÏ299ר˶Çóµ÷¼Á +13 +21 2026-04-09 13/650 2026-04-13 14:16 by ÕÅzhihao
[¿¼ÑÐ] 335Çóµ÷¼Á +18 ÏëÉϰ¶Ñ½£¡£¡ 2026-04-12 19/950 2026-04-13 14:15 by ÕÅzhihao
[¿¼ÑÐ] 211±¾¿Æ²ÄÁÏ»¯¹¤Çóµ÷¼Á +17 YHLAH 2026-04-11 20/1000 2026-04-13 08:46 by Sammy2
[¿¼ÑÐ] µ÷¼Á +10 ÔÂ@163.com 2026-04-11 10/500 2026-04-12 09:14 by zhouyuwinner
[¿¼ÑÐ] ¼ÆËã»ú22408 281·Ö£¬Çóµ÷¼Á +7 17715607211 2026-04-06 7/350 2026-04-12 00:43 by xuxiang
[¿¼ÑÐ] 331Çóµ÷¼Á +5 Íõ¹ú˧ 2026-04-11 5/250 2026-04-11 22:56 by Ϫ½§Á÷Ë®
[¿¼ÑÐ] 283Çóµ÷¼Á +22 ÄǸöàà×Ó 2026-04-09 22/1100 2026-04-11 10:41 by ÄæË®³Ë·ç
[¿¼ÑÐ] ÖÐҩѧµ÷¼Á ³õÊÔ324 +4 Ñó¸Ê¾Õ¡¢ 2026-04-10 6/300 2026-04-11 09:41 by gong120082
[¿¼ÑÐ] µ÷¼Á +19 СÕÅZA 2026-04-10 20/1000 2026-04-10 22:08 by Öí»á·É
[¿¼ÑÐ] ¼ª´ó¼ÆËã»ú¼¼Êõ331·Ö£¬Ó¢ÓïÁù¼¶£¬Çóµ÷¼Á +3 ·å·å021116 2026-04-09 3/150 2026-04-10 20:01 by chemisry
[¿¼ÑÐ] ±¾¿ÆÎ÷¹¤´ó 324Çóµ÷¼Á +4 wysyjs25 2026-04-10 4/200 2026-04-10 20:00 by À´¿´Á÷ÐÇÓê10
[¿¼ÑÐ] 296Çóµ÷¼Á +6 Íô£¡£¿£¡ 2026-04-08 6/300 2026-04-10 11:02 by mattzhming
[¿¼ÑÐ] ±¾¿ÆÎ÷¹¤´ó 0856 324Çóµ÷¼Á +10 wysyjs25 2026-04-09 11/550 2026-04-10 08:37 by 5268321
[¿¼ÑÐ] ¿¼Ñе÷¼Á-²ÄÁÏÀà-284 +28 Ïë»»ÊÖ»ú²»Ïë½âÊ 2026-04-08 28/1400 2026-04-09 20:08 by µ¹Êý321?
[¿¼ÑÐ] ²ÄÁÏר˶(0856) 339·ÖÇóµ÷¼Á +9 ¹þ¹þ¹þ¶ì¹þ¹þ¹þ 2026-04-09 10/500 2026-04-09 20:01 by Orcid
[¿¼ÑÐ] 349ѧ¿Æ»¯Ñ§045106Çóµ÷¼Á£¬»¯Ñ§Àà¶¼¿ÉÒÔ +8 ±£ºÃ¶®¶® 2026-04-08 8/400 2026-04-09 14:03 by xulei3024
[¿¼ÑÐ] 22408 266Çóµ÷¼Á +11 masss11222 2026-04-07 14/700 2026-04-08 11:06 by yulian1987
[¿¼ÑÐ] 277Çóµ÷¼Á +4 ¿¼Ñе÷¼Álxh 2026-04-06 6/300 2026-04-08 10:40 by ÄæË®³Ë·ç
[¿¼ÑÐ] 344Çóµ÷¼Á +11 κ×Óper 2026-04-07 11/550 2026-04-07 23:01 by JourneyLucky
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û