如图所示(第一张),直线L1:y=3x+3与y轴交于B点,与直线L2交于y轴上一点A,且L2与x的交点为C(1,0)(1)求证:∠ABC=∠ACB(2)如图所示(第二张),过x轴上一点D(-3,0),做DE⊥AC于E,DE交y轴于F点,
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![如图所示(第一张),直线L1:y=3x+3与y轴交于B点,与直线L2交于y轴上一点A,且L2与x的交点为C(1,0)(1)求证:∠ABC=∠ACB(2)如图所示(第二张),过x轴上一点D(-3,0),做DE⊥AC于E,DE交y轴于F点,](/uploads/image/z/1166983-7-3.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%EF%BC%88%E7%AC%AC%E4%B8%80%E5%BC%A0%EF%BC%89%2C%E7%9B%B4%E7%BA%BFL1%EF%BC%9Ay%3D3x%2B3%E4%B8%8Ey%E8%BD%B4%E4%BA%A4%E4%BA%8EB%E7%82%B9%2C%E4%B8%8E%E7%9B%B4%E7%BA%BFL2%E4%BA%A4%E4%BA%8Ey%E8%BD%B4%E4%B8%8A%E4%B8%80%E7%82%B9A%2C%E4%B8%94L2%E4%B8%8Ex%E7%9A%84%E4%BA%A4%E7%82%B9%E4%B8%BAC%EF%BC%881%2C0%EF%BC%89%EF%BC%881%EF%BC%89%E6%B1%82%E8%AF%81%EF%BC%9A%E2%88%A0ABC%3D%E2%88%A0ACB%EF%BC%882%EF%BC%89%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%EF%BC%88%E7%AC%AC%E4%BA%8C%E5%BC%A0%EF%BC%89%2C%E8%BF%87x%E8%BD%B4%E4%B8%8A%E4%B8%80%E7%82%B9D%EF%BC%88-3%2C0%EF%BC%89%2C%E5%81%9ADE%E2%8A%A5AC%E4%BA%8EE%2CDE%E4%BA%A4y%E8%BD%B4%E4%BA%8EF%E7%82%B9%2C)
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