±±¾©Ê¯ÓÍ»¯¹¤Ñ§Ôº2026ÄêÑо¿ÉúÕÐÉú½ÓÊÕµ÷¼Á¹«¸æ
²é¿´: 336  |  »Ø¸´: 1

¹þ¹þÀï77

½ð³æ (СÓÐÃûÆø)

[ÇóÖú] ÇóÖú¸ßÖÐÊýѧ

ÒÑÖªº¯Êýf£¨x£©=axƽ·½+£¨4a+2£©x+4a-6£¬
Ôòʹº¯Êýf£¨x£©ÖÁÉÙÓÐÒ»¸öÕûÊýÁãµãµÄËùÓÐÕýÕûÊýaµÄÖµÖ®ºÍµÈÓÚ
´ð°¸ÊÇ20 Çó¹ý³Ì



[ Last edited by soliton923 on 2011-8-12 at 21:46 ]
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

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

563583184

½ð³æ (³õÈëÎÄ̳)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¹þ¹þÀï77(½ð±Ò+20): 2011-08-13 11:19:42
½â£º
a£¨x£©£¨Æ½·½£©+£¨4a+2£©x+4a-6=0£»¡£¡£¡£¡£¡£¡£¡££¨1£©
a£¨x+2£©£¨Æ½·½£©+2£¨x+2£©-10=0£»
×÷y=x+2£¬µÃa£¨y£©£¨Æ½·½£©+2y-10=0£»¡£¡£¡£¡£¡£¡££¨2£©
ӦΪ½«£¨1£©µÃ½âÆ½ÒÆÁËÁ½¸öµ¥Î»£¬£¨1£©ÕûÊý½âÈÔÈ»ÊÇ£¨2£©µÃÕûÊý½â£¬£¨1£©·ÇÕûÊý½âÈÔÈ»ÊÇ£¨2£©µÃ·ÇÕûÊý½â¡£
£¨2£©»¯Îªa=10-2y/y£¨Æ½·½£©£¬ÒªÊ¹aΪÕûÊýµÄ±ØÒªÌõ¼þΪ10-2y>y(ƽ·½)£¬
µÃ-1-¸ùºÅ£¨11£© ÓÖyΪÕûÊýµÃyÖ»ÄÜΪ-4£¬-3£¬-2£¬-1,0,1,2.
½«y=-4£¬-3£¬-2£¬-1,0,1,2·Ö±ð´úÈëa=10-2y/(y)ƽ·½£¬Ö»ÓÐy=-1ºÍy=1ÄÜʹaΪÕýÕûÊý¡£
y=1ʱa=8£»
y=-1ʱa=12£»
ÍæºÃ£¬Ñ§ºÃ
2Â¥2011-08-13 11:03:40
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ ¹þ¹þÀï77 µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 305Çóµ÷¼Á +7 RuiFairyrui 2026-03-28 7/350 2026-03-29 00:40 by 544594351
[¿¼ÑÐ] 085600£¬×¨Òµ¿Î»¯¹¤Ô­Àí£¬321·ÖÇóµ÷¼Á +4 ´ó²öС×Ó 2026-03-28 4/200 2026-03-29 00:32 by 544594351
[¿¼ÑÐ] 298Çóµ÷¼Á +3 ÖÖÊ¥´Í 2026-03-28 3/150 2026-03-28 23:58 by wxiongid
[¿¼ÑÐ] ²ÄÁÏѧ˶333Çóµ÷¼Á +10 ±±µÀÏï 2026-03-24 10/500 2026-03-28 23:06 by Î޼ʵIJÝÔ­
[¿¼ÑÐ] 322Çóµ÷¼Á +7 ËÎÃ÷ÐÀ 2026-03-27 7/350 2026-03-28 21:27 by sanrepian
[¿¼ÑÐ] 275Çóµ÷¼Á +10 Micky11223 2026-03-25 14/700 2026-03-28 15:48 by Micky11223
[¿¼ÑÐ] 394Çóµ÷¼Á +3 ºÃʶàÄ¥¾²ºò¼ÑÒ 2026-03-26 5/250 2026-03-28 14:24 by ÌÆãå¶ù
[¿¼ÑÐ] 286Çóµ÷¼Á +12 PolarBear11 2026-03-26 12/600 2026-03-28 12:14 by zllcz
[¿¼ÑÐ] Ò»Ö¾Ô¸Äϲý´óѧ324Çóµ÷¼Á +7 hanamiko 2026-03-27 7/350 2026-03-28 09:56 by ÀîÉϰ¶0921
[²ÄÁϹ¤³Ì] Ò»Ö¾Ô¸C9²ÄÁÏÓ뻯¹¤×¨Òµ×Ü·Ö300Çóµ÷¼Á +8 Âü111 2026-03-24 9/450 2026-03-28 07:58 by YYYYX1234
[¿¼ÑÐ] 086502»¯Ñ§¹¤³Ì342Çóµ÷¼Á +6 °¢Ò̸´¹Å²»¹ý 2026-03-27 6/300 2026-03-28 07:06 by wangy0907
[¿¼ÑÐ] 287Çóµ÷¼Á +10 land xuxu 2026-03-26 10/500 2026-03-27 15:33 by ÅÁ¶ûÂíÀ­ÌØ
[¿¼ÑÐ] ¸´ÊÔµ÷¼Á£¬Ò»Ö¾Ô¸ÄÏÅ©083200ʳƷ¿ÆÑ§Ó빤³Ì +5 XQTJZ 2026-03-26 5/250 2026-03-27 14:49 by ¿ñìÅÂóµ±µ±
[¿¼ÑÐ] 308Çóµ÷¼Á +7 īīĮ 2026-03-25 7/350 2026-03-27 14:47 by ¿ñìÅÂóµ±µ±
[¿¼ÑÐ] Ò»Ö¾Ô¸Ö£´ó085600£¬310·ÖÇóµ÷¼Á +5 Àîäì¿É 2026-03-26 5/250 2026-03-27 11:14 by ²»³Ôô~µÄ؈
[¿¼ÑÐ] Ò»Ö¾Ô¸¼ª´ó071010£¬316·ÖÇóµ÷¼Á +3 xgbiknn 2026-03-27 3/150 2026-03-27 10:36 by guoweigw
[¿¼ÑÐ] 286Çóµ÷¼Á +4 lim0922 2026-03-26 4/200 2026-03-27 10:28 by guoweigw
[¿¼ÑÐ] Ò»Ö¾Ô¸ÉÂʦ´óÉúÎïѧ071000£¬298·Ö£¬Çóµ÷¼Á +5 SYA£¡ 2026-03-23 5/250 2026-03-27 09:29 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] 328Çóµ÷¼Á +4 LHHL66 2026-03-23 4/200 2026-03-23 14:55 by lbsjt
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û