老师有个地方不理解,请老师帮我解疑?已知抛物线y=1/2x²+bx与直线y=2x交于点O(0,0),A(a,12).点B是抛物线上O, A之间的一个动点,过点B分别作x轴、y轴的平行线与直线OA交于点C,E.(1)求抛
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![老师有个地方不理解,请老师帮我解疑?已知抛物线y=1/2x²+bx与直线y=2x交于点O(0,0),A(a,12).点B是抛物线上O, A之间的一个动点,过点B分别作x轴、y轴的平行线与直线OA交于点C,E.(1)求抛](/uploads/image/z/12046999-31-9.jpg?t=%E8%80%81%E5%B8%88%E6%9C%89%E4%B8%AA%E5%9C%B0%E6%96%B9%E4%B8%8D%E7%90%86%E8%A7%A3%2C%E8%AF%B7%E8%80%81%E5%B8%88%E5%B8%AE%E6%88%91%E8%A7%A3%E7%96%91%3F%E5%B7%B2%E7%9F%A5%E6%8A%9B%E7%89%A9%E7%BA%BFy%3D1%2F2x%26%23178%3B%2Bbx%E4%B8%8E%E7%9B%B4%E7%BA%BFy%3D2x%E4%BA%A4%E4%BA%8E%E7%82%B9O%EF%BC%880%2C0%EF%BC%89%2CA%EF%BC%88a%2C12%EF%BC%89.%E7%82%B9B%E6%98%AF%E6%8A%9B%E7%89%A9%E7%BA%BF%E4%B8%8AO%2C+A%E4%B9%8B%E9%97%B4%E7%9A%84%E4%B8%80%E4%B8%AA%E5%8A%A8%E7%82%B9%2C%E8%BF%87%E7%82%B9B%E5%88%86%E5%88%AB%E4%BD%9Cx%E8%BD%B4%E3%80%81y%E8%BD%B4%E7%9A%84%E5%B9%B3%E8%A1%8C%E7%BA%BF%E4%B8%8E%E7%9B%B4%E7%BA%BFOA%E4%BA%A4%E4%BA%8E%E7%82%B9C%2CE%EF%BC%8E%EF%BC%881%EF%BC%89%E6%B1%82%E6%8A%9B)
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