如图,直线y=-2x+n(n>0)与x轴、y轴分别交于点A、B,S△OAB=16,抛物线y=ax2+bx(a≠0)经过点A,顶点M在直线y=-2x+n上.(1)求n的值;(2)求抛物线的解析式;(3)如果抛物线的对称轴与x轴交于点N
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![如图,直线y=-2x+n(n>0)与x轴、y轴分别交于点A、B,S△OAB=16,抛物线y=ax2+bx(a≠0)经过点A,顶点M在直线y=-2x+n上.(1)求n的值;(2)求抛物线的解析式;(3)如果抛物线的对称轴与x轴交于点N](/uploads/image/z/8624295-63-5.jpg?t=%E5%A6%82%E5%9B%BE%2C%E7%9B%B4%E7%BA%BFy%3D-2x%2Bn%EF%BC%88n%EF%BC%9E0%EF%BC%89%E4%B8%8Ex%E8%BD%B4%E3%80%81y%E8%BD%B4%E5%88%86%E5%88%AB%E4%BA%A4%E4%BA%8E%E7%82%B9A%E3%80%81B%2CS%E2%96%B3OAB%3D16%2C%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dax2%2Bbx%EF%BC%88a%E2%89%A00%EF%BC%89%E7%BB%8F%E8%BF%87%E7%82%B9A%2C%E9%A1%B6%E7%82%B9M%E5%9C%A8%E7%9B%B4%E7%BA%BFy%3D-2x%2Bn%E4%B8%8A%EF%BC%8E%EF%BC%881%EF%BC%89%E6%B1%82n%E7%9A%84%E5%80%BC%EF%BC%9B%EF%BC%882%EF%BC%89%E6%B1%82%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%883%EF%BC%89%E5%A6%82%E6%9E%9C%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%9A%84%E5%AF%B9%E7%A7%B0%E8%BD%B4%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E4%BA%8E%E7%82%B9N)
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