设抛物线y=ax^2+bx-2与x轴交于两个不同的点A(-1,0),B(m,0),与y轴交于点C,且∠ACB=90°.(1)求m的值和抛物线的解析式;(2)已知点D(1,n)在抛物线上,过点A的直线y=x+1交抛物线于另一点E.若点P在x轴
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![设抛物线y=ax^2+bx-2与x轴交于两个不同的点A(-1,0),B(m,0),与y轴交于点C,且∠ACB=90°.(1)求m的值和抛物线的解析式;(2)已知点D(1,n)在抛物线上,过点A的直线y=x+1交抛物线于另一点E.若点P在x轴](/uploads/image/z/10364223-39-3.jpg?t=%E8%AE%BE%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dax%5E2%2Bbx-2%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E4%BA%8E%E4%B8%A4%E4%B8%AA%E4%B8%8D%E5%90%8C%E7%9A%84%E7%82%B9A%28-1%2C0%29%2CB%28m%2C0%29%2C%E4%B8%8Ey%E8%BD%B4%E4%BA%A4%E4%BA%8E%E7%82%B9C%2C%E4%B8%94%E2%88%A0ACB%3D90%C2%B0.%EF%BC%881%EF%BC%89%E6%B1%82m%E7%9A%84%E5%80%BC%E5%92%8C%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%9A%84%E8%A7%A3%E6%9E%90%E5%BC%8F%EF%BC%9B%EF%BC%882%EF%BC%89%E5%B7%B2%E7%9F%A5%E7%82%B9D%EF%BC%881%2Cn%EF%BC%89%E5%9C%A8%E6%8A%9B%E7%89%A9%E7%BA%BF%E4%B8%8A%2C%E8%BF%87%E7%82%B9A%E7%9A%84%E7%9B%B4%E7%BA%BFy%3Dx%2B1%E4%BA%A4%E6%8A%9B%E7%89%A9%E7%BA%BF%E4%BA%8E%E5%8F%A6%E4%B8%80%E7%82%B9E.%E8%8B%A5%E7%82%B9P%E5%9C%A8x%E8%BD%B4)
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