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Giatam204
2 năm trước
1, Chứng minh rằng các phân số sau là tối giản: 18n+3/21n+7 và n^3+2n/n^4+3n^2+1 2, Cho hàm số y = f(x) = 2-9x^2+x Giúp em bài này với. Cảm ơn trước!
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