Toán Lớp 7: (x-1).(x-2).(3-x) >= 0 (-x+1)/(x-2) -1 Tìm x

Toán Lớp 7: `(x-1).(x-2).(3-x) >= 0` `(-x+1)/(x-2) < 0` `(2x-1)/(x-1)

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