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#73 [ΌOΘ΅]
±ΑΏͺΕΎΑ½―Ηc
a^2+b^2+c^2=(a+b+c)^2-2(ab+bc+ca)=4-2(ab+bc+ca)
(ab+bc+ca)ͺΕεΖΘκΞζ’¨a^2+b^2+c^2=(ab+bc+ca)¨ _(^O^)^
ΦΑ½
:08/11/02 01:43 
:N902iX 
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#74 [ΌOΘ΅]
β«x,y,zΙΘΑΔιiΦj½ΟΘ
ͺͺ{[bΖ΅Διέ½’ΎΘ°^)ΙΌ
:08/11/02 01:46 :N902iX :
#75 [δ
]
έρΘΗ±u]Ε·©H
:08/11/05 09:45 :SH706i :1JL.4EJI
#76 [±°Ξί]
ΤΙόκΔΊ³’τ
γεγwΪw΅Δά·σσ
QΕ·σξ
:08/11/06 00:43 :W52SA :M3tJtmsc
#77 [ΌOΘ΅]
>>75>>3QΖ
>>76Η€ΌΗ€Ό(LΦM)
γγΝο΅’―ΗAͺρΞΑΔ('Ν')
:08/11/06 14:42 :N902iX :qVwIXhIU
#78 [δ]
>>77·έάΉρ©ΔάΉρΕ΅½
θͺΖ€²΄’ά·
ΰόκΔΎ³’
kεEςu]Ε·B
:08/11/06 15:27 :SH706i :GZMU9omw
#79 [½ΔΫέΈήΞΙαΙαρbanana/0vM]
qΦ₯M)
:08/11/06 20:10 :F905i :nipAR.42
#80 [ΌOΘ΅]
kςΰοΦΎ΅ͺρΞΑΔp(^^)q
±ΜXΙΝku]’Θ©Α½Μ©(LMj
:08/11/06 23:58 :N902iX :qVwIXhIU
#81 [±°Ξί]
ΌOΘ΅³ρΛ
θͺΖ€²΄’ά·σ~ζ£θά·φΒ
δχΌ³ρΛ
ίά΅Δσξσξ
½ΞΕ·©φ[
:08/11/07 00:17 :W52SA :qhxWIwD6
#82 [δ]
>>Ό³΅³ρ
θͺΖ€²΄’ά·
ζ£θά·
>>±°Ξί³ρ
18ΞΕ·Ql΅Δά·
¨έ’ζ£θά΅ε€
:08/11/07 13:31 :SH706i :zpBz8JW2
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