作者查詢 / binbinthink
作者 binbinthink 在 PTT 全部看板的留言(推文), 共4292則
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全部CS_TEACHER1781tutor770Math752MapleStory194toberich106teaching84HomeTeach78JX375JOB-Hunting61FengYuan39ONE_PIECE39Keelung29marriage25Old-Games24babysitte15AION13PttLifeLaw13job11Salary10maruko8PeopleSeries8part-time7BBSmovie6GetMarry6Hate4Isayama4TuTsau4Food3NCCU_trans3Sony-style3trans_math3Visual_Basic3Benny_Chan2Doraemon2L_LifeJob2scu_transfer2SET2Transfer2wretch2ASHS-93-li1Aviation1B95303XXX1Buddhism1ChungShin3311ck57th3041cksh78th201CMU_M481CMU_M491CSMU-bridge1CSMU-MED931CSMU-MED971CSMU-MIS941CSMU-MT931CSMU-MT941CSMU-MT951CSMU-OT951CSMU-SO1CTSH923011CTSH97EXP1CYCU_BME91B1FamilyCircle1FJU-ACC94b1FJU-Chinese1FJU-Leader1FJU_NIGHT1flying1FXM91-3291Gemini1Haruhi1HisShark1HLHS_10thU1HSNU_10551HTSH913121Instant_Mess1joke1KG94-301.21KG95-3041KS92-3071KS94-3111KS94-3131KS94-3201ME_BADMINTON1Men5431NCCU07_DIP1NCCU07_Math1NCCU_mathG981NCCU_mathG991NCHU-AGR031NCHU-AGR061NCHU-KF1NCHU-photo1NCYU_HoRt_951NCYU_MIS_971NDHU-phy961NDHU-phy981NDHU_ACC_8th1NDHU_ACC_9th1NDMC-guitar1NKNU_OECE971northtrans1NSYSU_EE95-11NTPU-ACC951NTPU-COECO941NTU-EM921NTUBST951NTUDormM71NTUE-ME981NTUE_Nse991NTUF-951NTUMEB951NTUmed911Palmar_Drama1pay_home1pccu_ee891PT-941RIPE_gender1RSSH91_3021RSSH94_3031SCU_chem921sex1SHIAW1SSSH-13th3111TaiwanDrama1TakkiTsubasa1TalesWeaver1TFSHS67th3091TFSHS67th3261THU-CHEM941THU_BA20001TKU_INS1TuCheng1WuLing46-3051YCSH_alumni1YP95-3131Yup02-031Zastrology1<< 收起看板(136)
3F推:若是國中的話~縱橫天下的國中資優數學~挺有挑戰性!!03/07 20:18
4F→:不過內容有些是真的有難度就是了!!!03/07 20:18
2F→:|ax+1|=b,同除以a,|x+1/a|=b/|a|03/08 11:50
3F→:|x-(-1/a)|=b/|a|,03/08 11:51
4F→:3,11代入得,|3-(-1/a)|=b/|a|,|11-(-1/a)|=b/|a|03/08 11:52
5F→:比較兩式得知3到(-1/a)的距離與11到(-1/a)相等03/08 11:53
6F→:故(-1/a)=(3,11中點7),得a=-1/703/08 11:54
7F→:同理比較兩式得距離為 b/|a|=4,a代入得b=4/703/08 11:55
12F推:個人覺得(a,b)=(0,1)代入|0x+1|=1,x=3or11是有問題的03/10 16:43
13F→:(0,1)不太適合當答案03/10 16:43
3F推:個人覺得要看這種情形常發生還是就此一次03/06 20:50
4F→:常發生就講清楚~錢算清楚~就此一次~那就別計較這半03/06 20:50
5F→:小時~畢竟你還要教這學生很久!!!03/06 20:51
1F推:小六的話我會先解釋連續奇數都差203/04 17:46
2F→:44個奇數相隔43個~43*2=86~03/04 17:47
3F→:也就是說大數是小數的三倍~大數比小數多兩倍~03/04 17:47
4F→:這兩倍也等於86~所以每一倍是4303/04 17:48
5F→:再由43*3=12903/04 17:48
2F推:怎麼看都覺得倒數第二排錯誤!!!01/18 10:23
6F推:同意二樓,個人也覺得題目這樣敘述問題一大堆01/18 10:26
7F→:既然是 我愛你諧音了,就只有520才是01/18 10:26
8F→:555.222.000......等的都不是520諧音吧?01/18 10:27
18F推:過B作直線CD和直線AD的垂線且分別交於F和E兩點12/31 16:35
19F→:角A=135度所以角BAE=45度~所以線段AE=線段BE=712/31 16:36
20F→:所以三角形BAD已可算~又弧AB=弧AC~所以線段BF=線段BE12/31 16:37
21F→:(AAS全等可證出)所以線段FD=線段ED=5+7=1212/31 16:38
22F→:所以三角形BCD亦可算~相加即四邊形面積~12/31 16:38
23F→:註:圓心有沒有在CD上我沒去想~不過不管在不在~都可算12/31 16:39
11F推:C大講的有點問題~角A=50~角B=60~角C=70~一定不是等腰12/31 17:09
12F→:三角形OBD中~角OBD=30度~角D=90度~故線段DB=5根號312/31 17:10
13F→:又三角形BCD中~角B=60度~角D=90度~所以線段CD=15~12/31 17:13
14F→:且線段BC=10根號312/31 17:13
15F→:所求=三角形ACD周長-線段CD+線段BD+線段BC=25+15根號312/31 17:14
6F→:又三角形BCD中~角B=60度~角D=90度~所以線段CD=15~12/31 17:11
7F→:且線段BC=10根號312/31 17:11
8F→:所求=三角形ACD周長-線段CD+線段BD+線段BC=25+15根號312/31 17:12