关于二次函数的高中数学题1.在直角坐标系中,抛物线y=-4/9x^2+2/9mx+5/9m+4/3与x轴交于A,B两点,点A在负半轴上,点B在正半轴上,且OB的绝对值=2OA的绝对值,点C是抛物线的顶点.(1)求m的值(2)若P在抛
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![关于二次函数的高中数学题1.在直角坐标系中,抛物线y=-4/9x^2+2/9mx+5/9m+4/3与x轴交于A,B两点,点A在负半轴上,点B在正半轴上,且OB的绝对值=2OA的绝对值,点C是抛物线的顶点.(1)求m的值(2)若P在抛](/uploads/image/z/1526033-65-3.jpg?t=%E5%85%B3%E4%BA%8E%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0%E7%9A%84%E9%AB%98%E4%B8%AD%E6%95%B0%E5%AD%A6%E9%A2%981.%E5%9C%A8%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%E4%B8%AD%2C%E6%8A%9B%E7%89%A9%E7%BA%BFy%3D-4%2F9x%5E2%2B2%2F9mx%2B5%2F9m%2B4%2F3%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E4%BA%8EA%2CB%E4%B8%A4%E7%82%B9%2C%E7%82%B9A%E5%9C%A8%E8%B4%9F%E5%8D%8A%E8%BD%B4%E4%B8%8A%2C%E7%82%B9B%E5%9C%A8%E6%AD%A3%E5%8D%8A%E8%BD%B4%E4%B8%8A%2C%E4%B8%94OB%E7%9A%84%E7%BB%9D%E5%AF%B9%E5%80%BC%3D2OA%E7%9A%84%E7%BB%9D%E5%AF%B9%E5%80%BC%2C%E7%82%B9C%E6%98%AF%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%9A%84%E9%A1%B6%E7%82%B9.%EF%BC%881%EF%BC%89%E6%B1%82m%E7%9A%84%E5%80%BC%EF%BC%882%EF%BC%89%E8%8B%A5P%E5%9C%A8%E6%8A%9B)
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