如图1,在平面直角坐标系中,A(a,0),B(b,0),C(-1,2),且|2a+b+1|+(a+2b-4)²=0(1)求a,b的值;(2)①在x轴的正半轴上存在一点M,使△COM的面积=1/2△ABC的面积,求出点M的坐标;②在坐标轴的
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![如图1,在平面直角坐标系中,A(a,0),B(b,0),C(-1,2),且|2a+b+1|+(a+2b-4)²=0(1)求a,b的值;(2)①在x轴的正半轴上存在一点M,使△COM的面积=1/2△ABC的面积,求出点M的坐标;②在坐标轴的](/uploads/image/z/5301634-58-4.jpg?t=%E5%A6%82%E5%9B%BE1%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%EF%BC%88a%2C0%EF%BC%89%2CB%EF%BC%88b%2C0%EF%BC%89%2CC%EF%BC%88-1%2C2%EF%BC%89%2C%E4%B8%94%7C2a%2Bb%2B1%7C%2B%EF%BC%88a%2B2b-4%EF%BC%89%26%23178%3B%3D0%EF%BC%881%EF%BC%89%E6%B1%82a%2Cb%E7%9A%84%E5%80%BC%EF%BC%9B%EF%BC%882%EF%BC%89%E2%91%A0%E5%9C%A8x%E8%BD%B4%E7%9A%84%E6%AD%A3%E5%8D%8A%E8%BD%B4%E4%B8%8A%E5%AD%98%E5%9C%A8%E4%B8%80%E7%82%B9M%2C%E4%BD%BF%E2%96%B3COM%E7%9A%84%E9%9D%A2%E7%A7%AF%3D1%2F2%E2%96%B3ABC%E7%9A%84%E9%9D%A2%E7%A7%AF%2C%E6%B1%82%E5%87%BA%E7%82%B9M%E7%9A%84%E5%9D%90%E6%A0%87%EF%BC%9B%E2%91%A1%E5%9C%A8%E5%9D%90%E6%A0%87%E8%BD%B4%E7%9A%84)
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