在Rt△ABC中,∠ACB=90°,AB=5,sin∠CAB=4/5 D是斜边AB上一点,过点A作AE⊥CD,垂足为E,AE交直线BC于点F.当点F在边BC上时,设AD=x BF=y 求y关于x的函数解析式及其定义域
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![在Rt△ABC中,∠ACB=90°,AB=5,sin∠CAB=4/5 D是斜边AB上一点,过点A作AE⊥CD,垂足为E,AE交直线BC于点F.当点F在边BC上时,设AD=x BF=y 求y关于x的函数解析式及其定义域](/uploads/image/z/3819880-64-0.jpg?t=%E5%9C%A8Rt%E2%96%B3ABC%E4%B8%AD%2C%E2%88%A0ACB%3D90%C2%B0%2CAB%3D5%2Csin%E2%88%A0CAB%3D4%2F5+D%E6%98%AF%E6%96%9C%E8%BE%B9AB%E4%B8%8A%E4%B8%80%E7%82%B9%2C%E8%BF%87%E7%82%B9A%E4%BD%9CAE%E2%8A%A5CD%2C%E5%9E%82%E8%B6%B3%E4%B8%BAE%2CAE%E4%BA%A4%E7%9B%B4%E7%BA%BFBC%E4%BA%8E%E7%82%B9F.%E5%BD%93%E7%82%B9F%E5%9C%A8%E8%BE%B9BC%E4%B8%8A%E6%97%B6%2C%E8%AE%BEAD%3Dx+BF%3Dy+%E6%B1%82y%E5%85%B3%E4%BA%8Ex%E7%9A%84%E5%87%BD%E6%95%B0%E8%A7%A3%E6%9E%90%E5%BC%8F%E5%8F%8A%E5%85%B6%E5%AE%9A%E4%B9%89%E5%9F%9F)
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