如果二次函数y=-X2+2x+3的图象顶点为点P,点O是坐标原点,求三角形OPN的面积?由(1)得,二次函数解析式为:y=-x2+2x+3,则二次函数的顶点为点P(1,4),点N(3,0),∴S△OPN=1/2ON×|P纵坐标|=6.(这是试
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![如果二次函数y=-X2+2x+3的图象顶点为点P,点O是坐标原点,求三角形OPN的面积?由(1)得,二次函数解析式为:y=-x2+2x+3,则二次函数的顶点为点P(1,4),点N(3,0),∴S△OPN=1/2ON×|P纵坐标|=6.(这是试](/uploads/image/z/1064561-41-1.jpg?t=%E5%A6%82%E6%9E%9C%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0y%3D-X2%2B2x%2B3%E7%9A%84%E5%9B%BE%E8%B1%A1%E9%A1%B6%E7%82%B9%E4%B8%BA%E7%82%B9P%2C%E7%82%B9O%E6%98%AF%E5%9D%90%E6%A0%87%E5%8E%9F%E7%82%B9%2C%E6%B1%82%E4%B8%89%E8%A7%92%E5%BD%A2OPN%E7%9A%84%E9%9D%A2%E7%A7%AF%3F%E7%94%B1%EF%BC%881%EF%BC%89%E5%BE%97%2C%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0%E8%A7%A3%E6%9E%90%E5%BC%8F%E4%B8%BA%EF%BC%9Ay%3D-x2%2B2x%2B3%2C%E5%88%99%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0%E7%9A%84%E9%A1%B6%E7%82%B9%E4%B8%BA%E7%82%B9P%EF%BC%881%2C4%EF%BC%89%2C%E7%82%B9N%EF%BC%883%2C0%EF%BC%89%2C%E2%88%B4S%E2%96%B3OPN%3D1%2F2ON%C3%97%7CP%E7%BA%B5%E5%9D%90%E6%A0%87%7C%3D6%EF%BC%8E%28%E8%BF%99%E6%98%AF%E8%AF%95)
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