如图已知抛物线y=3/4x2+bx+c与坐标轴交于A,B,C三点A(-1,0),过点c的直线y=3/(4t)x-3与x轴交于点Q,点P是线段BC上的一个动点,过p作ph垂直ob于h.若pb=5t,且0 小于t小于1 点C的坐标是 b= c= 且线段QH的长
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![如图已知抛物线y=3/4x2+bx+c与坐标轴交于A,B,C三点A(-1,0),过点c的直线y=3/(4t)x-3与x轴交于点Q,点P是线段BC上的一个动点,过p作ph垂直ob于h.若pb=5t,且0 小于t小于1 点C的坐标是 b= c= 且线段QH的长](/uploads/image/z/5929119-63-9.jpg?t=%E5%A6%82%E5%9B%BE%E5%B7%B2%E7%9F%A5%E6%8A%9B%E7%89%A9%E7%BA%BFy%3D3%2F4x2%2Bbx%2Bc%E4%B8%8E%E5%9D%90%E6%A0%87%E8%BD%B4%E4%BA%A4%E4%BA%8EA%2CB%2CC%E4%B8%89%E7%82%B9A%28-1%2C0%29%2C%E8%BF%87%E7%82%B9c%E7%9A%84%E7%9B%B4%E7%BA%BFy%3D3%2F%EF%BC%884t%EF%BC%89x-3%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E4%BA%8E%E7%82%B9Q%2C%E7%82%B9P%E6%98%AF%E7%BA%BF%E6%AE%B5BC%E4%B8%8A%E7%9A%84%E4%B8%80%E4%B8%AA%E5%8A%A8%E7%82%B9%2C%E8%BF%87p%E4%BD%9Cph%E5%9E%82%E7%9B%B4ob%E4%BA%8Eh.%E8%8B%A5pb%3D5t%2C%E4%B8%940+%E5%B0%8F%E4%BA%8Et%E5%B0%8F%E4%BA%8E1++%E7%82%B9C%E7%9A%84%E5%9D%90%E6%A0%87%E6%98%AF++b%3D+++c%3D++%E4%B8%94%E7%BA%BF%E6%AE%B5QH%E7%9A%84%E9%95%BF)
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