1Â¥:ÄäÃûÓû§
×îСֵÊÇ2 ¡£´Ëʱx=2
2Â¥:×óÄþСÓê
×îСֵΪ2,´ËʱxΪ2.
Øx+1Ø+Øx-2Ø+Øx-3ØÇó×îСֵ,ÎÒ²»ÒªÖ±½ÓµÄ½á¹û,ÎÒÒªµÄÊÇͨË×Ò׶®µÄ¹ý³ÌºÍÄã¶ÔÕâµÀÌâµÄÀí½â
3Â¥:ÄäÃûÓû§
,||Æäy =Øx+1Ø+Øx-2Ø+Øx-3ØÒò :|x+1| >=0,|x-1| >=0, |x-3| >=0,ÇÒ²»ÄÜͬʱΪ0
ËùÒÔ :|x+1| ,|x-1| , |x-3|ÆäÖÐÒ»ÏîΪ0ʱ,yÈ¡µÃ×îСֵ
µ±:x = -1 ʱ y = |-1-2|+|-1-3|=3+4=7x = 2 ʱ y = |2+1|+|2-3|=3+1=4x = 3 ʱ y = |3+1|+|3-2|=4+1=5¼´: x = 2 ʱ,y=4Ϊ×îСֵ
4Â¥:²Ü²Ù
¾ø¶ÔÖµ×îС,Ö»ÓÐÿ¸ö¾ø¶ÔÖµÀïÃ涼Ϊ0,¼´x=-1,2,3 È»ºó´ø½øÈ¥Äĸö×îС¾ÍÊÇÄĸöÖµ¿©
5Â¥:Ô¶·½µÄÓÎÕß
½«xÈ¡Öµ·ÖËĶÎÌÖÂÛ,È¥µô¾ø¶ÔÖµ,Çó³öÿ¶ÎÇø¼äÄÚµÄ×îСֵ¼´¿É¡£
6Â¥:ÄäÃûÓû§
¸ù¾ÝÌâÒâ,½«xµÄ·¶Î§·ÖΪ(-¡Þ,-1),(-1,2),(2,3),(3,+¡Þ)Ëĸö·¶Î§½øÐÐÌÖÂÛ,ÔÙÇó×îСֵ
7Â¥:Ðϱ±·½
ÄãÕâ¸öÎÊÌâÎʵúÃ!
»»Í¼»òÐí¶ÔÄãÓаïÖú
,ÍƼöµÄ**:
https://****de**os.***/calculator
Øx-1ØÊ®|x+2ØÊ®ØxÒ»3صÄ×îСֵÊÇ
8Â¥:ÄäÃûÓû§
·Ç¸ºÊý,×îСӦ¸ÃÊÇ0¡£µ«±¾ÌâxÈ¡ÏàͬµÄÖµ,×îС²»ÔÙÊÇ0,(x=1,-2,3)Ö»ÓÐÔÚx=1ʱ,Ôʽ×îСֵÊÇ5
9Â¥:ÄäÃûÓû§
Òò¸ÃÊÇ5
¿ÉÒÔ°ÑÕâÈý¸ö¾ø¶ÔÖµ¿´³ÉÊǵ½ÊýÖáÉϵÄ-2,1,3ÕâÈý¸öµãµÄ¾àÀë,ÕâÑù¿ÉÒÔ¿´µ½ÈôÏëµ½ÕâÈý¸öµãµÄ¾àÀë×îС,ÔòÑ¡È¡µÄµãÓ¦¸ÃÔÚÖмäµÄµãx=1ÉÏ,Õâʱµãµ½-2µÄ¾àÀëΪ3,µ½3µÄ¾àÀëΪ2,ËùÒÔ×ܾàÀëÊÇ5.
º¯Êýy=Øx-1Ø+Øx-2Ø+Øx-3Ø+...+Øx-10صÄ×îСֵ
10Â¥:¶Î¸Éî£Ë¼Í®è¥
¡ßØxØ¡Ü4,
¡àµ±x=2ʱ,º¯Êýy=Øx-1Ø+Øx-2Ø+Øx-3ØÓÐ×îСֵÊÇ2¡àµ±x=-4ʱ,º¯Êý»Øy=Øx-1Ø+Øx-2Ø+Øx-3ØÓÐ×î´óÖµÊÇ
18¡àµ±ØxØ¡Ü´ð4ʱ,º¯Êýy=Øx-1Ø+Øx-2Ø+Øx-3صÄ×î´óÖµ¼õÈ¥×îСֵµÄ²îÊÇ18-2=16
11Â¥:¹«ÑòóÞÄêɳ
Óɾø¶ÔÖµµÄ¼¸³ºÎÒâÒå,µ±µãxÔÚ(5,6)Ö®¼äbaiʱ,µãduxµ½µã1¡¢2¡¢3¡¢......10µÄ¾àzhiÀë×îС
(10-1)+(9-2)+(8-3)+(7-4)+(6-5)=9+7+5+3+1
=25ËùÇó×îСֵdaoÊÇ25
²»»áÊÇ45¡£¿ÉÑéÖ¤25<45
ÇóØx+1Ø+Øx-2Ø+Øx-3صÄ×îСֵ
12Â¥:ÖÔʶÍòºèêÍ
¾ø¶ÔÖµbai¿ÉÒÔ¿´×÷ÊǶÔdu¾àÀëµÄÔËËã.
Øx+1Ø+Øx-2Ø+Øx-3ØÒâ˼¾ÍÊÇzhiÒªÇóÊýÖádaoÉÏÒ»¸öµãµ½-1,2,3ÕâÈý¸ö°æ
µãµÄ¾àÀëºÍȨ.
×îСֵ¾ÍÊǾàÀëºÍµÄ×îСֵ.
¿ÉÒÔÏÈ¿´Á½¸öÀýÈçÏÈ¿´Øx+1Ø+Øx-2Ø.
ÔòÔÚ-1µ½2Ö®¼äµÄµãµ½Á½µã¾àÀëºÍ×îС,¶¼ÊÇ3.ÔÙÀ´¿´Øx-2Ø,¶øÕâЩµãµ½3µÄ¾àÀë×îСµÄµ±È»ÊÇ2Õâ¸öµãÁË.ËùÒÔx=2ʱ×îС.
µ±È»Ò²¿ÉÒÔÏÈ¿´Øx+1Ø+Øx-3Ø.
ÔÚ-1µ½3Ö®¼ä¶¼×îСΪ4.¶øÕâЩµãµ½2µÄ¾àÀë×îСµÄ¾ÍÊÇ2ÁË,¾àÀëÊÇ0.ËùÒÔ×ܾàÀë×îС¾ÍÊÇ4.
Ò²¾ÍÊǵ±ÇÒ½öµ±x=2ʱ,ÔʽȡµÃ×îСֵ4.
º¯Êýy=Øx-1Ø+Øx-2Ø+Øx-3Ø+...+Øx-10صÄ×îСֵ
13Â¥:ÄäÃûÓû§
Óɾø¶ÔÖµµÄ¼¸ºÎÒâÒå,µ±
µãxÔÚ(5,6)Ö®¼äʱ,µãxµ½µã1¡¢2¡¢3¡¢......10µÄ¾àÀë×îС(10-1)+(9-2)+(8-3)+(7-4)+(6-5)=9+7+5+3+1
=25ËùÇó×îСֵÊÇ25
²»»áÊÇ45¡£¿ÉÑéÖ¤25<45
14Â¥:ÕædeÎÞÉÏ
Õâ¿ÉÒÔÀí½âΪÇó1~10ÉÏÒ»µã Óë¸÷¸öÕûÊýµãµÄ¾àÀëÖ®ºÍÈç´Ë ÄãÓ¦¸ÃÁ˽âÔÚxÔÚ5~6ʱ ¾àÀë×îС
y=x-1+x-2+x-3+x-4+x-5+6-x+7-x+8-x+9-x+10-x=25
15Â¥:ÄäÃûÓû§
¾ø¶ÔÖµÄÚÓÐÁ½ÊýÖ®²î¼ÈÊÇÁ½ÊýÔÚÊýÖáÉϵľàÀë
´ËÌâ¼ÈÊÇÒ»¸öÊýµ½12345678910¾àÀëÖ®ºÍÏëÏóһϻò»Ò»ÏÂ
1Óë10µÄÖеã×î¼Ñ×î·½±ã¼ÆËã
¼´x=5.5
y=25
16Â¥:ÄäÃûÓû§
ºÜÃ÷ÏÔx=5.5ʱ×îС y=25
Øx-1Ø+Øx-2Ø+Øx-3Ø+l+Øx-1997صÄ×îСֵ
17Â¥:ÄäÃûÓû§
Ó¦¸ÃÊǵ± x = 999 ʱÓÐ×îСֵ 997002 °É
¶ÔÁËÄǸöl ±íʾ,Ñ»·µÄÒâ˼°É
18Â¥:¿É±¡ÒÒçø
ÀûÓþø¶ÔÖµµÄ¼¸ºÎÒâÒåÖª:´ËÌâÏ൱ÓÚÔÚÊýÖáÉÏÇóÒ»µãp(x),ʹËüµ½µã(1)¡¢(2)¡¢(3)¡¢......¡¢(2009)µÄ¾àÀëºÍ×îС¡£ÏÔÈ»,Ö»Óе±p(x)ÔÚµã(2005)ʱ,²ÅÄÜÈ¡µÃ×îСֵ¡£
ÓÚÊÇ,Øx-1Ø+Øx-2Ø+Øx-3Ø+......Øx-2008Ø+Øx-2009صÄ×îСֵ=2(1+2+3+......+1005)=1011030
ØxÊ®1ØÊ®Ø+2رíʾµÄ¼¸ºÎÒâÒå
1Â¥ ÄãÉêÇëÁËÓÎÏ·µÄÄêÁäÊDz»ÊÇÒ»¸öÏÞÖÆ°¡£¿ idºÅ£¬Ç°Á½ ¸öÊ¡µÄÇøºÅ£¬È»ºóÊÇÊÐÇøÅÅÃûµÚ¶þ£¬ÔÚ³ÇÊеØÇøÔò×îºóÁ½¸öÊý×Ö£¬Á½Ãû°ËºóÄúµÄ³öÉúÈÕÆÚ Èç¹ûÉêÇë²»³É¹¦³ÉÄêºóÆÚ£¬µ±È» ºó£¬Õâ¾ÍÊÇÄãµÄ¼ÒÊý£¬ÄÐË«ÅÅÃûµÚÒ»µÄÊǺó£¬×îºóÒ»¸öΪ0µÄУÑéºÍΪ10£¬10Óëx´ú±í¡£Äã¿ÉÒÔÊÔÊÔÕâЩ×ÔÎÒµÄidºÅ£¬³öÉúÄê·ÝÊÇÏñϵĸĸ...
ÒÑÖªaØØ,ÒÑÖªA={xØØx-aØ=4}£¬B={1£¬2£¬b} (1)ÊÇ·ñ´æÔÚʵÊýa£¬Ê¹µÃ¶ÔÓÚÈÎÒâʵÊýb
1Â¥ ÄäÃûÓû§ a b ҪʹµÃ¶ÔÓÚÈÎÒâʵÊýb ¶¼ÓÐ a b Ôò a µÃ 1 a 4 1ÇÒa 4 2 ´ËʱÎÞ½â 2 a 4 2ÇÒa 4 1 ´ËʱÎ޽⠴Ӷø Âú×ãÒªÇóµÄʵÊýa²»´æÔÚ Ï£Íû¶ÔÄãÓÐËù°ïÖú »¹Íû²ÉÄÉ ÒÑÖªa xØØx aØ 4 b 1 2£¬b ÊÇ·ñ´æÔÚʵÊýa£¬Ê¹µÃ¶ÔÓÚÈÎÒâʵÊýb b 1ÇÒb 2...
µ±a 2,ØbØ3ʱ,Çó,µ±|a|=2,ØbØ=3ʱ,Çó1/a-1/bµÄÖµ
1Â¥ ÌìʹµÄÐdz½ a 2 ØbØ 3 a 2»ò 2£¬ b 3»ò 3 µ±a 2£¬b 3£¬1 a 1 b 1 2 1 3 1 6µ±a 2£¬b 3£¬1 a 1 b 1 2 1 3 5 6µ±a 2£¬b 3£¬1 a 1 b 1 2 1 3 5 6µ±a 2£¬b 3£¬1 a 1 b 1 2 1 3 1 6 ÈôØa...