三个有理数a,b,c满足a:b:c=2:3:5,且a2+b2+c2=abc,则a+b+c=
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![三个有理数a,b,c满足a:b:c=2:3:5,且a2+b2+c2=abc,则a+b+c=](/uploads/image/z/671910-6-0.jpg?t=%E4%B8%89%E4%B8%AA%E6%9C%89%E7%90%86%E6%95%B0a%2Cb%2Cc%E6%BB%A1%E8%B6%B3a%3Ab%3Ac%3D2%3A3%3A5%2C%E4%B8%94a2%2Bb2%2Bc2%3Dabc%2C%E5%88%99a%2Bb%2Bc%3D)
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三个有理数a,b,c满足a:b:c=2:3:5,且a2+b2+c2=abc,则a+b+c=
三个有理数a,b,c满足a:b:c=2:3:5,且a2+b2+c2=abc,则a+b+c=
三个有理数a,b,c满足a:b:c=2:3:5,且a2+b2+c2=abc,则a+b+c=
设a=2k b=3k c=5k带入得
a²+b²+c²=38k²=30k³
∵k≠0
∴k=19/15
∴a+b+c=10k=190/15