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如图1,在平面直角坐标系中,已知抛物线y=ax2+bx﹣5与x轴交于A(﹣1,0),B(5,0)两点,与y轴交于点C. (1)求抛物线的函数表达式; (2)若点D是y轴上的一点,且以B,C,D为...
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