如图,在平面直角坐标系中,A(a,0) ,B(b,0) ,C(-2,1),且la+2b+1l如图,在平面直角坐标系中,A(a,0) ,B(b,0) ,C(-2,1),且la+2b+1l+(3a-4b+13)的平方=0 1.求a,b的值. 2.在y轴上存在一点D,使得三角形COD的面积是三角形AB
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![如图,在平面直角坐标系中,A(a,0) ,B(b,0) ,C(-2,1),且la+2b+1l如图,在平面直角坐标系中,A(a,0) ,B(b,0) ,C(-2,1),且la+2b+1l+(3a-4b+13)的平方=0 1.求a,b的值. 2.在y轴上存在一点D,使得三角形COD的面积是三角形AB](/uploads/image/z/13943330-26-0.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E5%B9%B3%E9%9D%A2%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%E4%B8%AD%2CA%28a%2C0%29+%2CB%28b%2C0%29+%2CC%28-2%2C1%29%2C%E4%B8%94la%2B2b%2B1l%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E5%B9%B3%E9%9D%A2%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%E4%B8%AD%2CA%28a%2C0%29++%2CB%28b%2C0%29+++%2CC%28-2%2C1%29%2C%E4%B8%94la%2B2b%2B1l%2B%283a-4b%2B13%29%E7%9A%84%E5%B9%B3%E6%96%B9%3D0++1.%E6%B1%82a%2Cb%E7%9A%84%E5%80%BC.+2.%E5%9C%A8y%E8%BD%B4%E4%B8%8A%E5%AD%98%E5%9C%A8%E4%B8%80%E7%82%B9D%2C%E4%BD%BF%E5%BE%97%E4%B8%89%E8%A7%92%E5%BD%A2COD%E7%9A%84%E9%9D%A2%E7%A7%AF%E6%98%AF%E4%B8%89%E8%A7%92%E5%BD%A2AB)
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