某商品在近30天内每件的销售价格P元和时间t的关系如图所示第一问解答为P=t+19,0≤t<25,t属于N 100-t ,25≤t≤30,t属于N
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![某商品在近30天内每件的销售价格P元和时间t的关系如图所示第一问解答为P=t+19,0≤t<25,t属于N 100-t ,25≤t≤30,t属于N](/uploads/image/z/5194581-69-1.jpg?t=%E6%9F%90%E5%95%86%E5%93%81%E5%9C%A8%E8%BF%9130%E5%A4%A9%E5%86%85%E6%AF%8F%E4%BB%B6%E7%9A%84%E9%94%80%E5%94%AE%E4%BB%B7%E6%A0%BCP%E5%85%83%E5%92%8C%E6%97%B6%E9%97%B4t%E7%9A%84%E5%85%B3%E7%B3%BB%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%E7%AC%AC%E4%B8%80%E9%97%AE%E8%A7%A3%E7%AD%94%E4%B8%BAP%3Dt%2B19%2C0%E2%89%A4t%EF%BC%9C25%2Ct%E5%B1%9E%E4%BA%8EN++++++++++++++++++++++++100-t+%2C25%E2%89%A4t%E2%89%A430%2Ct%E5%B1%9E%E4%BA%8EN)
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