ʸ
ʿȤäƤޤ
7,5,3λѷͭ̾Ǥ(󥿡ˤ褯ФƤޤ)
ϤǤϤʤä褦Ǥ

(33+1)(33-1) = 32ФƤޤ

32/4 + 3^2 =17
111ڡ 0:17:10 39948

Dz򤭤ɤäѤؤ
AB=x Ȥơ£ä;Ȥx^2+x=8
ޤţá3x^2/4ܡ3x/4 =3(x^2+x)/4 = 23
Ϣƣ£äΣܤǡãĤܤʤΤ餫ʤΤ
ƣܤˤʤޤ

裲롼ס 111ڡ 11:21:52 HomePage:39949
abcba@baLLjugglermoka
ߤޤ󡣼ʬͶǤȿ餱ƤޤؤäƤޤޤAB=xȤȻʿѤơX(X+1)=8ޤ׻Ƥ17ޤ
111ڡ 0:35:12 39950
⡼ޥ
Ʊؤ...^^;...⤻...Orz...

AB=x
x^2+x+3^2 Ф褤Τ...
x^2+1-2x*cos120=3^2
x^2+x=8

x^2+x+3^2=8+9=17

ɤ...^^;...Orz...
111ڡ 0:46:26 39951
å
ABCȢDFC , DABȢCAEϹƱꡢ3B,F,Dϰľˤ롣
ACD᭩ , BCF᭡ , ABCᢤDFCѤ򤪤ȡ
CAEᢤDAB
ᢤACDܢABCݢBCFݢDFC
᭩ܡݭݡ

äơͳѷAECDѤϭܭ᭱
111ڡ 0:56:24 39952
ⳤǷ
(3cmѷѡ2)-(1cmѷ)
111ڡ 3:35:06 39953
ϥ饮㡼ƥ
Ϥ褦ޤABCγդ;ǵƤȤѤ׻
׻MATHEMATICAˤ르겡׻ǵޤ
111ڡ 8:49:34 HomePage:湩ؤ˥39954
Namba
¿ؤ
AB=xȤABC;Ѥ
x^2+x=8ĭ
ACBFθGȤ롣
ABG=ABCݢGBC=12060=60=GFC
FC//AB
äƢABGȢCFGAB:CF=x:1
FG:GB=1:x ꢤFGC:BGC=1:x
CG:GA=1:x ꢤFGC:BGC:AGB=1:x:x^2
FC:AB=1:x ꢤFCB:AEB=(1+x):(1+x)x^2
ʾ
FBC:AEC=(1+x):x+x^2+(1+x)x^2=(1+x):(x+2x^2+x^3)
=(1+x):x(1+x)^2=1:x(1+x)=1:x^2+x=1:8()
FBC:ADC=1:9ǤΤ
ͳѷAECDѤѷFBCѤ17
111ڡ 8:56:16 39955
Ȥ
AB=aȤƢABC;ȤAB
A,B줾Ⱦ3,1αߤθ
AECD=ABE+ABC+ACD=(AB/2)^2*sqrt(3)+AB*Cyɸ/2+(3/2)^2*sqrt(3)
BFC=(1/2)^2*sqrt(3)dzämaximaФ

solve(1+a^2+a=9,a)$
rhs(part(%,2))$
e1:(x-%)^2+y^2=1$
e2:x^2+y^2=9$
solve([e1,e2],[x,y])$
part(%,2)$
rhs(part(%,2))$
factor(((%th(6)/2)^2*sqrt(3)+%th(6)*%/2+(3/2)^2*sqrt(3))/((1/2)^2*sqrt(3)));17()
˭ԡ 111ڡ 9:16:21 MAIL:fttnm528@ybb.ne.jp 39956
Namba
#39955
FCBȢAEC
BC:EC=1:(1+x)
⤵ FC:AB=1:x(FC//ABǤ뤿)
äƢFCB;AEC=1:x(1+x)ȤñǤ
111ڡ 10:08:43 39957

ϿܤƤƲɤ򤷤ΤϳǧޤġɸȤʤʿǡĢùˤʤ뤰餤׻ƽλޤ
111ڡ 10:28:50 HomePage:39958

Ǥְ㤤
ɸ;
111ڡ 10:35:45 HomePage:39959
uchinyan
Ϥˤϡơϡ
轵Ʊͤ˻餷Ǥ͡ʴǡ

ޤABC C 濴˻ײ 60ž DFC ˽Ťͤȡ
AC = DCBC = FCBCF = 60= ACDACB = BCF - ACF = ACD - ACF = DCF
ʤΤǡABC DFC ˤԤäŤʤޤ
ǡDF = ABDFC = ABC = 120ǡCFB = 60ʤΤǡDFB Ʊľˤޤ
Ĥޤꡤ޷DABF DAB ˤʤޤ
ˡDAB A 濴˻ײ 60ž CAE ˽Ťͤȡ
DA = CABA = EADAC = 60= BAEDAB = DAC + CAB = BAE + CAB = CAE
ʤΤǡDAB CAE ˤԤäŤʤޤ
ǡ
AECD = DAC + CAE = DAC + DAB
= DAC + (DAB + FBC) - FBC = DAC + (DACF + ABC) - FBC = DAC + (DACF + DFC) - FBC
= DAC + DAC - FBC = DAC * 2 - FBC
ǡDACFBC ѷǡѷϤ٤ʤΤѤϰդΣ㤹뤫顤
BC = 1 cmAC = 3 cmDAC = FBC * 9Ȥʤäơ
= (FBC * 9) * 2 - FBC = FBC * 18 - FBC = FBC * 17
ĤޤꡤAECD Ѥ FBC 17 ܤˤʤޤ

󡤺Ǹμη׻դϡǤϿ޼뤳Ȥˤʤޤ
ͥνȡ 111ڡ 12:38:57 MAIL:uchi@sco.bekkoame.ne.jp 39960
uchinyan
ǼĤɤߤޤ
ճȿزˡ¿褦Ǥ
ؤǤϴñǤѷϤ٤ϻȻʿܼ㴳μ׻Dz򤱤ޤ͡
ȤƤϡʤʤä褦Ǥ

#39952#39960
ABC DFCDAB CAE ϹƱBFD ϰľˤ롤ʤɤȤˡ

#39953
(3cmѷѡ2)-(1cmѷ)
Ȥ̤Ȥˡˡξܺ٤

#39948#39949#39950#39951#39954#39955#39956#39957#39958
ؤˤˡ
ͥνȡ 111ڡ 13:06:24 MAIL:uchi@sco.bekkoame.ne.jp 39961
ޤ륱
ѷǵޤ
Ȥǡ֤轵ΤޤޤǤϤʤǤ
111ڡ 14:16:22 39962
mukku
ؤǡऺ
111ڡ 20:44:28 39963

žѷĤABCA濴˲žȢDFCȹƱޤǤϽĴäΤǤDABȢCAEιƱȯǤޡɻʿˤʤäƤޤޤϤDz򤱤ΤڤǤ֤äפ¾βǼΤڤǤ͡
111ڡ 22:47:56 39964
ڥ
ʤ󤫺Ƕ֤ܼ줿פߤʤäʤ
112ʶ 10:12:25 39965
Ѥä
⻻Ǥϥॺ
112ʶ 12:36:56 39966

ľѻѷABCäAB=(33-1)/2ᡢդĹȤä9+(33-1)/2+(17-33)/2=17Ȥꤢ򤱤
ϵ塡 112ʶ 14:09:49 39967
åѤ
ʡ̾ʤ
Ƹɡ 116ʲС 19:43:29 MAIL:hopes@mba.ocn.ne.jp HomePage:HOPES褤Ȥ٤Ϥ39968
Ф
褦󤵤˶ᤤ褦ʴѤ̵ǤƤʤ
117ʿ 1:21:38 39969
Ф
ҤޤĤ֤3βˡٶޤ3ݣݣᣰʤβ򤱤ޤ
117ʿ 1:25:36 39970
ޥ
#39962 ʤޤ륱󤵤
äޡޤm(__)m

#39968 ʥåѤ
GmailΥե륿ǥ᡼밷ˤʤäƤޤäƤޤäƽɽˤǺܤƤޤm(__)m
MacBookAir 117ʿ 15:06:51 HomePage:֥39971