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定义：在平面直角坐标系中，O为坐标原点，对于二次函数y=ax2+bx+c（a≠0），我们称函数y=为它的“关联”函数，例如：y=2x2-3x+4的“关联”函数为y=．设二次函数y=x2-x-2的“关...
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