二次函数开口相反,最多有几个交点? 知乎 Template




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Try and sketch some of theseAirship, Silverware, Clothesline, Street car, Mill, Kayak, Friend, Trampoline, Treasure map, Turban, view more ideas


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tomski二次函数开口相反,最多有几个交点? 知乎 coloring