已知直线L1:y=k1x+b1经过点(-1,6)和(1,2)它和x轴,y轴分别交于B,A,直线L2:y=k2x+b2,经过点(2,-4)和(0,-3),它和x轴y轴的交点分别是D和c,(1)求直线l1的解析式;(2)求四边形ABCD的面积;(3)设直线l1
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![已知直线L1:y=k1x+b1经过点(-1,6)和(1,2)它和x轴,y轴分别交于B,A,直线L2:y=k2x+b2,经过点(2,-4)和(0,-3),它和x轴y轴的交点分别是D和c,(1)求直线l1的解析式;(2)求四边形ABCD的面积;(3)设直线l1](/uploads/image/z/8912194-34-4.jpg?t=%E5%B7%B2%E7%9F%A5%E7%9B%B4%E7%BA%BFL1%3Ay%3Dk1x%2Bb1%E7%BB%8F%E8%BF%87%E7%82%B9%28-1%2C6%29%E5%92%8C%281%2C2%29%E5%AE%83%E5%92%8Cx%E8%BD%B4%2Cy%E8%BD%B4%E5%88%86%E5%88%AB%E4%BA%A4%E4%BA%8EB%2CA%2C%E7%9B%B4%E7%BA%BFL2%3Ay%3Dk2x%2Bb2%2C%E7%BB%8F%E8%BF%87%E7%82%B9%282%2C-4%29%E5%92%8C%EF%BC%880%2C-3%EF%BC%89%2C%E5%AE%83%E5%92%8Cx%E8%BD%B4y%E8%BD%B4%E7%9A%84%E4%BA%A4%E7%82%B9%E5%88%86%E5%88%AB%E6%98%AFD%E5%92%8Cc%2C%EF%BC%881%EF%BC%89%E6%B1%82%E7%9B%B4%E7%BA%BFl1%E7%9A%84%E8%A7%A3%E6%9E%90%E5%BC%8F%EF%BC%9B%EF%BC%882%EF%BC%89%E6%B1%82%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%E7%9A%84%E9%9D%A2%E7%A7%AF%EF%BC%9B%EF%BC%883%EF%BC%89%E8%AE%BE%E7%9B%B4%E7%BA%BFl1)
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