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sonly11062004
2 năm trước
A=3 phần căn x +1 - (x lớn hơn 0) B=căn x +16 phần căn x + 5 -(x lớn hơn hoặc = 0) C=2 căn x +19 phần căn x +3 -(x lớn hơn hoặc = 0)
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