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được thưởng
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Đăng nhập hàng ngày 05/01/2017
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đặt câu hỏi
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nhanh nha cần gấp lắm ạ .
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Giải hệ PT $\begin{cases}x^3 - x^2y + y^3 = 3x^2 + y \\ x^2 + xy - y^2 = x-y \end{cases}$
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được thưởng
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Đăng nhập hàng ngày 02/01/2017
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đặt câu hỏi
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giúp mình với
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ột thanh AB khối lượng 8kg dài 60cm được treo nằm ngang nhờ hai sợi dây dài 50cm như hình. Tính lực căng của dây treo và lực nén hoặc kéo thanh trong mỗi trường hợp. Lấy g=10m/s2.![](data:image/png;base64,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) ![](data:image/png;base64,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)
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được thưởng
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Đăng nhập hàng ngày 14/12/2016
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được thưởng
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Đăng nhập hàng ngày 12/12/2016
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được thưởng
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Đăng nhập hàng ngày 03/12/2016
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được thưởng
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Đăng nhập hàng ngày 29/11/2016
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đặt câu hỏi
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nhanh nha cần gấp lắm ạ .
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Cho tam giác ABC có AB=4 , BC=5 , CA=6 . a/ Tính vectoGA.vectoGB + vectoGB.vectoGC + vectoGC.vectoGA với G là trong tâm tam giác ABC
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được thưởng
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Đăng nhập hàng ngày 10/11/2016
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đặt câu hỏi
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nhanh nha
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Giải phương trình 2can(2-x)(5-x) = x + can(2-x)(10-x)
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đặt câu hỏi
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giup minh voi
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Giải phương trình căn(2x^2 +x+1) + căn(x^2 - x +1) = 3x
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