Mathematics
Senior High
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ๆ€ฅใŽใงใ™๐Ÿ’ฆ
ใƒ™ใ‚ฏใƒˆใƒซใฎๅ•้กŒใŒๅˆ†ใ‹ใ‚Šใพใ›ใ‚“ใ€‚
่งฃใๆ–นใ‚’ๆ•™ใˆใฆใใ ใ•ใ„m(_ _)m

7 โ–ณABCใจ็‚นP, ใŠใ‚ˆใณๆญฃใฎๆ•ฐa,b,cใซๅฏพใ—ใฆ, PA+bPB+cPC=0ใŒๆˆใ‚Š็ซ‹ใคใจใ็‚นPใฏใฉใฎใ‚ˆใ†ใชไฝ ็ฝฎใซใ‚ใ‚‹ใ‹ใ€‚

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