Trong kinh tế có một số khái niệm : Thặng dư sản xuất, thặng dư tiêu dùng, hàm cầu, hàm cung, điểm hoà vốn. Hãy giải thích rõ các khái niệm trên. Dùng tích phân xác định để nêu cách tính thặng dư sản xuất, thặng dư tiêu dùng, điểm hoà vốn khi biết hàm cung, hàm cầu. Dùng đồ thị để minh hoạ

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