函數(shù)模型及其應(yīng)用-wenkub
2022-08-15 11:40:40 本頁(yè)面
【正文】 b. What’ s the concentration of chlorine had been placed at 8 am ? tey ??0?t ppmy ?Let The concentration of chlorine had been placed is 2022/8/15 小結(jié)： ？ 步驟： 相關(guān)系數(shù) 判斷模型的適用性 越接近于 1，模型越合適 。 2022/8/15 ? two chlorine doses were used , one at 8 am and another at 12 noon, what concentrations would be needed at these times to ensure that the concentration did not fall below ppm before 3 pm? 兩次分別需要投入多少濃度的氯，才能確保 3pm前氯的濃度不低于 4?t ??? emppmem ?? ??3?t ??? meppmem ?? ?? ppmey ?? ??p p mm ???The concentration of chlorine had been placed is at 8am, The concentration of chlorine had been placed is 2ppm at 12 noon。s the concentration of chlorine after t hours? 如果一開(kāi)始投入 m ppm 氯，那么 t hours 氯的濃度為多少？ ? the results to find the concentration that would be needed at 8 am on a similar day to ensure that the chlorine concentration did not fall below (parts per million) before 3 pm. 一開(kāi)始需要投入多少濃度的氯，才能確保 3pm 前氯的濃度不低于 ? concentration would be needed at 8 am that the concentration did not fall below ppm before 12 noon? 一開(kāi)始需要投入多少濃度的氯，才能確保 12 noon 前氯的濃度不低于 two chlorine doses were used , one at 8 am and another at 12 noon, what concentrations would be needed at these times to ensure that the concentration did not fall below ppm before 3 pm. 兩次分別需要投入多少濃度的氯，才能確保 3pm前氯的濃度不低于 2022/8/15 1. If the conce
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