Ŭˤä7/6ˤʤ޷Ƥꤨ͡
ȤפäƲľ׻ߥ7/12ˤʤääΤ
7/6äƤȤդȤƤޤ
75ڡ 0:26:00 39542

x,PBCyȤ
AB*PB*sin(x)=18
AB*PC*sin(x)=8
BC*PB*sin(y)=14
BC*PC*sin(y)=14
Ȥ

Dz򤭤ʬʤ
APCưȤǡĤäƤʤäƥե꡼Ƥޤ
75ڡ 0:30:55 39543
ޥĥ
7/66/7񤭴ְ㤨Ʒޤ
ɤϲʤΤǤ礦
ͤϡĤȤȡѣ£ġ£ãĤꡢѣģ£áģá
¡áᥢ£áᥤãġᥦ£ġᥨȤȡ
ꥢߥߥ᣹ߥߥᣴ
ȤʤꡢѤ碌ưʲͤߡȤޤ
75ڡ 0:32:57 39544
ޥ
FAQˡ֤ΣᣴΤȤᣲפΤ褦ʷ׻OKȵƤΤǡޤդ...ȻפäƽꤷƤޤޤm(__)m
iMac 75ڡ 0:37:50 HomePage:֥39546

#39544
βˡȤۤƱǤ
ߥߥ97ꡢ/7ߥ/9ߥ
ߥߥᣴꡢ/7ߥ/4ߥ
Ĥ򤫤ơ(/)^249/36ꡢ/7/6

ˡʤʤ
75ڡ 0:40:25 39547

£Фȣäθ
¡áᣱȤ

ѣãѣ£ä
ѣСѣáѣáѣ

ѣá᣷ѣ¡ѣСᣵʤΤ
ѣ¡᣷壵

£Ѥ;Ѥ
ѣ£ѡᣲ

£ä;Ѥƣ£ä롣
75ڡ 0:41:29 39548
ޥ
ꤷƤΤϡ#39547ʤ ˤ˶ᤤˡǤ
iMac 75ڡ 0:42:44 HomePage:֥39549

#39543
x,PBCyȤ
AB*PB*sin(x)=18
AB*PC*sin(y)=8
BC*PB*sin(y)=14
BC*PC*sin(x)=14
̯˥ץߥäƤޤ
75ڡ 0:44:00 39550
ͣ.ǥ
Ф¡£áã˲򤽤줾졡ѡҡӤȤ
У¡Уá94¡äꡡУѡУӡ94
ȤʻѷǤƤΤ
У¡УҡУáУ
УáУҡУ¡У
飳Ĥ㼰ꡢУѡУҡУ¡Уá32
ʣ*Уѡˡʣ£*УҡˡᢤУ¡У£á97
äơ£á*7/6
ƶڤ񤱤ФʤäΤǤް ޡȤȤϤʤ
ʤäȥåȤˡΤǤ礦͡
75ڡ 9:13:57 39551

APαĹBCθD
BPαĹCAθE
CPαĹABθFȤơ
ѷ򣶸Ĥʬ򤹤٤ƽ񤭽Ф
ˡPEC梤CEBPBF梤BCF椫ʬˤ
ޤ
ʬη׻ǤϡPF=3ȤơBC=115/3AB=225/77/6

⤦ꥴǤ
裲롼ס 75ڡ 1:13:44 HomePage:39552
CRYING DOLPHIN
ΤθˤϤޤäorz
ȤΤ⡢ȤǷƱˡۤʤꤷƤġ
[ȿʤΤǥ󥯤Ͼõ]

ȡ礭ʰϤȯΤ(⻲)ǤäȻƤΤǤ椬̵ˤʤ뤷Dz򤱤ʤȤȤǰ
ɡABBCPB¡BCáPCĤȤơѤ򶴤໰ѷ
ߦ¡áߦġ97¡ߦáߦġ74
äФޤ
710ʲС 9:24:23 39553
abcba@baLLjugglermoka
#39553ƱˡǤդη׻ߥ(ˤʤäƤޤ(^^;;;))򣲲äƤޤޤ
75ڡ 5:54:12 39554
ϺĹ
ͣ.ǥΡ֣Ф¡£áã˲򤽤줾졡ѡҡӡפȤ碌Ƥޤ
ã¡ᡢãӡ⡢УҡȤȡ
ãСУӡ£СУҡĤޤ4/ah/b
£СУѡãСУҡĤޤ9/b=h/a
줫=6Ȥʤޤ
Ȥϡ¡£áޤ
ʬʤߤޤ
2ֶ᤯ˡȤäƤޤäää

75ڡ 10:10:59 39555
uchinyan
Ϥˤϡơϡ
ࡤʤؤäݤʤäƤޤޤ
βˡ̾ؿؤȻפޤǤϥꥮ OK ʤΤǤ礦 ʴǡ

AB = AC ꡤABC = ACBCBP = ABC - ABP = ACB - BCP = ACPˤʤꡤ
(AB * PB)(BC * PC) = PABPBC = 97(CB * PB)(AC * PC) = PBCPCA = 74
(AB * PB * PB)(BC * PB * PC)(AC * PC * PC) = 974
(AB * PB * PB)(AC * PC * PC) = (AB * PB * PB)(AB * PC * PC) = (PB * PB)(PC * PC) = 94PBPC = 32
(AB * PB)(BC * PC) = (AB * 3)(BC * 2) = 97 = (9 * 2)(7 * 2) = (6 * 3)(7 * 2)ABBC = 67 = 1(7/6)
ǡBC AB 7/6 ܤˤʤޤ

äȻ餷ˡϡǼĤɤٶޤ
ͥνȡ 75ڡ 10:30:56 MAIL:uchi@sco.bekkoame.ne.jp 39556
uchinyan
ǼĤɤߤޤ
ࡤɤϡ椫ʬΤϳƱǡˡطʤΤƱ褦Ǥ
ϡɤ餷ޤȤ뤫ʤΤʡ

#39544#39546#39547#39549#39553#39554#39556
AB = ACABP = BCP CBP = ACP ˤʤΤȤäơ
(PB * PB)(PC * PC) = 94PBPC = 32ϤƱʤȤƳƲ򤯲ˡ

#39551#39555
P ABBCCA ˿򲼤ĹȤä椫ˡ

#39552
APBPCP αĹͤȤäƵˡ ФƤ褦ʤΤǡزˡΤ褦Ǥ

#39543(#39550¿)#39548
Ѵؿˤؤˤˡ
ͥνȡ 75ڡ 11:09:55 MAIL:uchi@sco.bekkoame.ne.jp 39557
ϥ饮㡼ƥ
٤ʤޤѴؿMATHEMATICAǤϻߤǤޤϤ褯ߤäƤޤ
75ڡ 15:47:31 HomePage:湩ؤإ39558
ʸ
򲼤ƹ⤵9:4:hȤ
ȤʻѷPC=x,PB=yȤ
xh = 4y
hy = 9x
xyh^2 = 36xyʤΤh=6

ä7/6

ꥢ륿ǻää
76ʶ 21:35:12 39559

BP//DAPC//AEȤʤDEľBC˼롣ѷDBPѷBCPѷCEP=9:7:4ꡢDB:BC:CE=9:7:4ѷABDȻѷECAAB=ACꡢBC=AB*7/6
79ʷ 13:43:33 39560

餷ޤʲ򤱤äǤ礦
ѴؿǤ顢ޤ׻褺Ƥޤ
http://twitpic.com/82lt6d
710ʲС 13:40:31 39561

οΤĤǤ
ʸפˤδϲ򤱤ʤΤ̤äƤ
710ʲС 18:51:21 39562
Ȥ
ɸ֤ޤ

ѤͤA(a/2,40/a),P(b,14/a),B(0,0),C(a,0)Ȥ
AP
e1:40/a=k*a/2+l$
e2:14/a=k*b+l$
solve([e1,e2],[k,l]);k=52*x/(a^2-2*a*b),l=(14*a-80*b)/(a^2-2*a*b)
ľAP:y=52*x/(a^2-2*a*b)+(14*a-80*b)/(a^2-2*a*b)
APαĹBCθ(Q)
solve(0=52*x/(a^2-2*a*b)+(14*a-80*b)/(a^2-2*a*b),x);x=(40*b-7*a)/26b)
Q((40*b-7*a)/26,0) ǢABQ-ABP=9 ʤΤǡ
(40*b-7*a)*(40/a)/52-(40*b-7*a)*(14/a)/52=9򤤤
solve((40*b-7*a)*(40/a)/52-(40*b-7*a)*(14/a)/52=9,b);b=5*a/8ǽˤ
P(5*a/8,14/a)
BPCˤ;ǤޤʸФγѤxȤ
P(5*a/8,14/a),C(a,0),B(0,0)
(5*a/8)^2+(14/a)^2=(5*a/8-a)^2+(14/a)^2+a^2-2*sqrt((5*a/8-a)^2+(14/a)^2)*a*cos(x)
cos(x)=((5*a/8-a)^2+(14/a)^2+a^2-(5*a/8)^2-(14/a)^2)/(2*sqrt((5*a/8-a)^2+(14/a)^2)*a)
ABPˤ;ǤޤʸФγѤxȤ
A(a/2,40/a),P(5*a/8,14/a),B(0,0)
(a/2-5*a/8)^2+(40/a-14/a)^2=(a/2)^2+(40/a)^2+(5*a/8)^2+(14/a)^2-2*sqrt((a/2)^2+(40/a)^2)*sqrt((5*a/8)^2+(14/a)^2)*cos(x)
cos(x)=((a/2)^2+(40/a)^2+(5*a/8)^2+(14/a)^2-(a/2-5*a/8)^2-(40/a-14/a)^2)/(2*sqrt((a/2)^2+(40/a)^2)*sqrt((5*a/8)^2+(14/a)^2))
cos(x)
((5*a/8-a)^2+(14/a)^2+a^2-(5*a/8)^2-(14/a)^2)/(2*sqrt((5*a/8-a)^2+(14/a)^2)*a)
=((a/2)^2+(40/a)^2+(5*a/8)^2+(14/a)^2-(a/2-5*a/8)^2-(40/a-14/a)^2)/(2*sqrt((a/2)^2+(40/a)^2)*sqrt((5*a/8)^2+(14/a)^2))
ѷ
2*sqrt((a/2)^2+(40/a)^2)*sqrt((5*a/8)^2+(14/a)^2)*((5*a/8-a)^2+(14/a)^2+a^2-(5*a/8)^2-(14/a)^2)
=2*sqrt((5*a/8-a)^2+(14/a)^2)*a*((a/2)^2+(40/a)^2+(5*a/8)^2+(14/a)^2-(a/2-5*a/8)^2-(40/a-14/a)^2)
򤯤ʬBCͤǤƤ줫ʬAB(ʸ֤Ȥ)Ф
ʬBC/ʬAB򡡿 xmaima ǵ
expand((2*sqrt((a/2)^2+(40/a)^2)*sqrt((5*a/8)^2+(14/a)^2)*((5*a/8-a)^2+(14/a)^2+a^2-(5*a/8)^2-(14/a)^2))^2-(2*sqrt((5*a/8-a)^2+(14/a)^2)*a*((a/2)^2+(40/a)^2+(5*a/8)^2+(14/a)^2-(a/2-5*a/8)^2-(40/a-14/a)^2))^2)$
solve(%,a)$
rhs(part(%,4))$
a:%$
expand((a/2)^2+(40/a)^2)$
factor(%)$
sqrt(%)$
expand(a/%);7/6()
˭ԡ 711ʿ 21:42:11 39563