延长AB到C,使BC=3AB,M.N是BC上的两点,且MN:NC=2:3,MN:NC=2:5,AC=100cm,求AB,BM,MN,CN的长延长AB到C,使BC=3AB,M.N是BC上的两点,且BM:MN=2:3,MN:NC=2:5,AC=100cm,求AB,BM,MN,CN的长
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![延长AB到C,使BC=3AB,M.N是BC上的两点,且MN:NC=2:3,MN:NC=2:5,AC=100cm,求AB,BM,MN,CN的长延长AB到C,使BC=3AB,M.N是BC上的两点,且BM:MN=2:3,MN:NC=2:5,AC=100cm,求AB,BM,MN,CN的长](/uploads/image/z/9339613-61-3.jpg?t=%E5%BB%B6%E9%95%BFAB%E5%88%B0C%2C%E4%BD%BFBC%3D3AB%2CM.N%E6%98%AFBC%E4%B8%8A%E7%9A%84%E4%B8%A4%E7%82%B9%2C%E4%B8%94MN%3ANC%3D2%3A3%2CMN%3ANC%3D2%3A5%2CAC%3D100cm%2C%E6%B1%82AB%2CBM%2CMN%2CCN%E7%9A%84%E9%95%BF%E5%BB%B6%E9%95%BFAB%E5%88%B0C%2C%E4%BD%BFBC%3D3AB%2CM.N%E6%98%AFBC%E4%B8%8A%E7%9A%84%E4%B8%A4%E7%82%B9%2C%E4%B8%94BM%3AMN%3D2%3A3%2CMN%3ANC%3D2%3A5%2CAC%3D100cm%2C%E6%B1%82AB%2CBM%2CMN%2CCN%E7%9A%84%E9%95%BF)
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