2N.K.
סˤλӤƤߤޤ

äȤƤޤʹ
32ڡ 0:15:55 46028
Mr.ǥ
Ȥꤢؤǡ
CA=3AD=2ˤȤ
;
(3k)^2+(2k+2)^22*3k*(2k+2)*cos60=3^2
򤤤
5/71
0ꡡ5/7
AC=15/7
BA:BC(24/7):38:7
AE=(15/7)*(8/15)8/7
줫黻ǡͤޤ
32ڡ 0:19:18 46029
baLLjugglermoka
ְ㤨ơACĹ15/7ܤ͡
ï֤ޤ󤫡
32ڡ 0:22:11 46030
!!!
BECDθGȤBCBF=2ȤʤF
BDG=BFG,CEG=CFGȤʤΤCE=1狼뤫餢Ȥ
AC:AD=3:2BC:CE=BA:AE=3:1Ȥ8/7
͡ 32ڡ 0:23:10 46031
ޥĥ
λȤǤ
32ڡ 0:25:12 46032
ޥĥ
λȤǤ
32ڡ 0:27:05 46033
ëʤäƽ񵭡Q֥
ޥĥ󡤤ޤ餱Ƥޤޤ
äѤ򤯤Τ٤Ǥ
32ڡ 0:49:16 46034
鯤ο
AE=x
ABEBCD¤Ȥȡ

ʬξ狼顢ܦ¡60롦

2/sin¡3/sin(2+)
x/sinAE/sinA
3/sin(2+)AE/sin2¡

顢tan3/5
060ꡢ
sin3/(27)
cos5/(27)

ABõơ׻ȡ
x=8/7
32ڡ 0:51:30 46035
ëʤäƽ񵭡Q֥
ëʤäƥ꡼󴧣ϤǤޤ
ޤ᡹񤤤ޤ礦
32ڡ 1:09:10 46037
鯤ο
AExADyCEzȤ

Ѥ2ʬ
y+2:3x:z
y:2x+z:3

ޤCDBEθFȤȡ
FϢABC⿴顢AFϢAΣʬˤʤ롣
äơ
AD:ACDF:FCBD:BC2:3
顢AC3/2y
ABCˢAˤĤ;Ѥȡy=10/7
ϢΩơ
x=8/7
z=1
//

32ڡ 1:32:40 46038
鯤ο
AD:ACDF:FCBD:BC2:3
顢AC3/2AD
ABCˢAˤĤ;ѤȡAD=10/7
AC10/7*3/215/7
AB10/7+224/7
ꡢAB:BC=8:7
AE15/7*(8/15)8/7

32ڡ 1:46:59 46039
ǯ
ABEBE򼴤ޤ֤DιԤFȤȡBF=2cmCF=1cm
ޤBECDθGȤȡ+=60٤ʤΤǡBGC=120
ΤˡCGE=BGD=BGF=CGF=60ȤʤꡢCFGCEGʤΤǡCF=CE=1cm
ʲϿء
AE=xAD=yȤȡ
Bʬꡢ3:1=2+y:x3x=2+y
Cʬꡢ3:2=1+x:y2+2x=3y
򤱤Сx=8/7 cm

32ڡ 10:17:21 46040
Ȥ
ɸD(0,0),C(a,0)ȤD,C濴ˤ줾Ĺ2,3αߤθȤB
ľCA,BAθA,;aޤ,ѤʬľCD,BEθ(2*a/5,0)
ľBEޤ,ľCAȤθEޤ껰ʿAE롡XMaxima

part(solve([x^2+y^2=4,(x-a)^2+y^2=9],[x,y]),1)$
part(solve([y=rhs(part(%o1,2))*x/rhs(part(%o1,1)),y=rhs(part(%o1,2))*(x-a)/(a-rhs(part(%o1,1)))],[x,y]),1)$
part(solve((rhs(part(%o2,1))^2+rhs(part(%o2,2))^2)*((a-rhs(part(%o2,1)))^2+rhs(part(%o2,2))^2)=(rhs(part(%o2,1))^2+rhs(part(%o2,2))^2+(a-rhs(part(%o2,1)))^2+rhs(part(%o2,2))^2-a^2)^2,a),4)$
part(solve([y=-rhs(part(%o1,2))*(x-2*a/5)/(2*a/5-rhs(part(%o1,1))),y=-rhs(part(%o2,2))*(x-a)/(a-rhs(part(%o2,1)))],[x,y]),1)$
ev(sqrt(expand((rhs(part(%o4,1))-rhs(part(%o2,1)))^2+(rhs(part(%o4,2))-rhs(part(%o2,2)))^2)),%o3);8/7()
˭ԡ 32ڡ 2:31:54 46041
ֿء׾ι
;ˤ򤭤ޤ
ä˵ޤФäưŻǤ
32ڡ 3:07:11 46042
uchinyan
Ϥˤϡơϡ
ϤʤʤȻפޤȤƤɸŪȻפäΤǤΨϰճ㤤Ǥ͡
ŪˤʤäƤޤޤʴǡ

BE CD Ȥθ I ȤޤI ABC ⿴ʤΤǡBAI = CAIǤޤ
BIC = 180- (CBI + BCI) = 180- (CBA + BCA)/2 = 180- (180- BAC)/2 = 180- (180- 60)/2 = = 180- 60= 120롤
BID = CIE = 180- BIC = 180- 120= 60롤Ǥ
ơ
BID BI ˴ؤޤ֤ E ΰư F ȤޤDBI = CBI F BC ˤޤ
ơBF = BD = 2 cmCF = BC - BF = 1 cmBIF = BID = 60롤CIF = BIC - BIF = 120- 60= 60= CIE
ǡFCI = ECI Ȥ碌ơCIF CIECE = CF = 1 cmǤ
ˡ
BAI = EAIBCI = ECIꡤABAE = BIEI = CBCE = 31AB = AE *
DAI = CAIDBI = CBIꡤADAC = DICI = BDBC = 23(AB - BD)(AE + CE) = 23
(AE * 3 - 2)(AE + 1) = 23(AE * 9 - 6)(AE * 2 + 2) = 66 = 11
AE * 9 - 6 = AE * 2 + 2AE * 7 = 8AE = 8/7 cm
ˤʤޤ

ǸդϣʤΤǤ٤ʬޤDz򤱤Τǡꥮ껻Ȼפޤ
⤦ޤ򤱤ȤΤǤ
32ڡ 12:30:03 46043
uchinyan
ǼĤɤߤޤ


ʲεҤϡ⤽ϻ伫ȤٶΥ˲᤮ʤΤǤ
޳ѤʤΤǤͤޤǤˤȻפäƸΤǤ
Ȥ⤢äơˡʬϻ F.A.Q. ΡֻϰϡפεҤ򻲹ͤˡ
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ޤǤ⤴ͤǤ餺

ࡤ路Ƥ褦ǤۤȤɤزˡΤ褦Ǥ
ꥮ껻ˡȻפΤϡ#46031#46040#46043٤ʡ
ξܺ٤ƱȤäƤ褵ǡ㤨С#46043
32ڡ 12:50:23 46044
ˤ
ؤǷ׻ޤ^^;
Ķļˡ 32ڡ 13:23:17 46045
ʤ
BEDCθF.BDBC˽Ťʤ褦ޤ֤DιԤGȤȡCEcmȤ狼ޤΤǡѷ椫顢AC=15/7cmȤʤޤ
32ڡ 14:35:38 46046
ߤƤ
˺Ƥ
32ڡ 19:13:40 46047
٥륯åĥ
ͼ٤Ϥʤ󤫼֤ꤽʤȻפĤġ򤱤̲äƤޤޤäƸ顢¤ѤդǤ򤱤äȤ
ʬθˣľơ3132椫578Фơšţá87ʤΤ8/7ȤʤޤˤۤοͤˡФƤȻפΤǾܺ٤ά
32ڡ 23:33:52 46048
̴
ο˿ͩëŵƤʤȤꡢ
īͤΤǤǤʬ餺
#46029Mr.ǥƱؤDz򤭡줫黻Ū
ͤƤߤޤ
33ʶ 8:10:01 46049
ϥ饮㡼ƥ
ŪǤ;Ǥ
33ʶ 17:37:24 HomePage:˥46050
ˤ⡼
ơѷ˻ѷĤꡢѤƳޤ㤴㤷ƤΤǡʸϤΤѡåץDzŽäۤʤȻפޤ
棵Ȥ䤫Ǥ͡
ڽǤΤޤ¡ 34ڡ 0:06:04 46051
cocogoo
2ʬ˹ͤϫޤ;2ʬACޤ
35 7:27:48 46052
ФȤ
깹˺Ƥޤ()

AE=x,AD=y,EC=zȤƳѤ2ʬ2;1ΩƤ
֤ѤĤϢΩ򤭤ޤ
줫黻Ūʲˡޤ
36ʷ 20:37:30 46053