若直线y=2x-15与抛物线y=ax2交于A、B两点,且A点的横坐标为3,(1)试求抛物线y=ax2的函数表达式; (2)请在同一直角坐标系内画出两个函数的图象; (3)在(2)中,若连接OA、OB,试求△AOB
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![若直线y=2x-15与抛物线y=ax2交于A、B两点,且A点的横坐标为3,(1)试求抛物线y=ax2的函数表达式; (2)请在同一直角坐标系内画出两个函数的图象; (3)在(2)中,若连接OA、OB,试求△AOB](/uploads/image/z/5248756-28-6.jpg?t=%E8%8B%A5%E7%9B%B4%E7%BA%BFy%EF%BC%9D2x%EF%BC%8D15%E4%B8%8E%E6%8A%9B%E7%89%A9%E7%BA%BFy%EF%BC%9Dax2%E4%BA%A4%E4%BA%8EA%E3%80%81B%E4%B8%A4%E7%82%B9%2C%E4%B8%94A%E7%82%B9%E7%9A%84%E6%A8%AA%E5%9D%90%E6%A0%87%E4%B8%BA3%2C%EF%BC%881%EF%BC%89%E8%AF%95%E6%B1%82%E6%8A%9B%E7%89%A9%E7%BA%BFy%EF%BC%9Dax2%E7%9A%84%E5%87%BD%E6%95%B0%E8%A1%A8%E8%BE%BE%E5%BC%8F%EF%BC%9B+%EF%BC%882%EF%BC%89%E8%AF%B7%E5%9C%A8%E5%90%8C%E4%B8%80%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%E5%86%85%E7%94%BB%E5%87%BA%E4%B8%A4%E4%B8%AA%E5%87%BD%E6%95%B0%E7%9A%84%E5%9B%BE%E8%B1%A1%EF%BC%9B+%EF%BC%883%EF%BC%89%E5%9C%A8%EF%BC%882%EF%BC%89%E4%B8%AD%2C%E8%8B%A5%E8%BF%9E%E6%8E%A5OA%E3%80%81OB%2C%E8%AF%95%E6%B1%82%E2%96%B3AOB)
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