b向量,满足IaI=2,IbI=1,Ia-bI=2求a*b,Ia+bI的值农产品A第X天的销售价格P=50-IX-6I(百元每百斤),一农户在第X天农产品A的销售量Q=40+IX-8I(百斤)[X在一到二十之间]求农户第七天销售农产品A的收入求
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![b向量,满足IaI=2,IbI=1,Ia-bI=2求a*b,Ia+bI的值农产品A第X天的销售价格P=50-IX-6I(百元每百斤),一农户在第X天农产品A的销售量Q=40+IX-8I(百斤)[X在一到二十之间]求农户第七天销售农产品A的收入求](/uploads/image/z/1636607-47-7.jpg?t=b%E5%90%91%E9%87%8F%2C%E6%BB%A1%E8%B6%B3IaI%3D2%2CIbI%3D1%2CIa-bI%3D2%E6%B1%82a%2Ab%2CIa%2BbI%E7%9A%84%E5%80%BC%E5%86%9C%E4%BA%A7%E5%93%81A%E7%AC%ACX%E5%A4%A9%E7%9A%84%E9%94%80%E5%94%AE%E4%BB%B7%E6%A0%BCP%3D50-IX-6I%EF%BC%88%E7%99%BE%E5%85%83%E6%AF%8F%E7%99%BE%E6%96%A4%EF%BC%89%2C%E4%B8%80%E5%86%9C%E6%88%B7%E5%9C%A8%E7%AC%ACX%E5%A4%A9%E5%86%9C%E4%BA%A7%E5%93%81A%E7%9A%84%E9%94%80%E5%94%AE%E9%87%8FQ%3D40%2BIX-8I%EF%BC%88%E7%99%BE%E6%96%A4%EF%BC%89%5BX%E5%9C%A8%E4%B8%80%E5%88%B0%E4%BA%8C%E5%8D%81%E4%B9%8B%E9%97%B4%5D%E6%B1%82%E5%86%9C%E6%88%B7%E7%AC%AC%E4%B8%83%E5%A4%A9%E9%94%80%E5%94%AE%E5%86%9C%E4%BA%A7%E5%93%81A%E7%9A%84%E6%94%B6%E5%85%A5%E6%B1%82)
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