大师作文网设f（2）=1,∫[0,2]f（x）dx=1,则∫[0,2]xf′（x）dx=?
![设f（2）=1,∫[0,2]f（x）dx=1,则∫[0,2]xf′（x）dx=?](/uploads/image/z/5269191-15-1.jpg?t=%E8%AE%BEf%EF%BC%882%EF%BC%89%3D1%2C%E2%88%AB%5B0%2C2%5Df%EF%BC%88x%EF%BC%89dx%3D1%2C%E5%88%99%E2%88%AB%5B0%2C2%5Dxf%E2%80%B2%EF%BC%88x%EF%BC%89dx%3D%3F)
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