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ๅ่ใซใใฆใใ ใใ
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https://examist.jp/mathematics/planar-vector/vector-mensekihi/
Mathematics
Senior High
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ๆฅใใงใ๐ฆ
ใใฏใใซใฎๅ้กใๅใใใพใใใ
่งฃใๆนใๆใใฆใใ ใใm(_ _)m
7 โณABCใจ็นP, ใใใณๆญฃใฎๆฐa,b,cใซๅฏพใใฆ, PA+bPB+cPC=0ใๆใ็ซใคใจใ็นPใฏใฉใฎใใใชไฝ
็ฝฎใซใใใใ
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ใใใใจใใใใใพใm(_ _)m