Toán Lớp 11: Cho (d) x+2y+1=0 Tìm đường thẳng d’ đối xứng qua tâm I(2;1)
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Toán Lớp 11: Cho (d) x+2y+1=0 Tìm đường thẳng d’ đối xứng qua tâm I(2;1)
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