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hihinhocau
2 năm trước
Cho Parabol (P) : y = $x^{2}$ và đường thẳng (d) : y = x + b. Tìm b để đường thẳng (d) cắt Parabol (P) tại hai điểm phân biệt A,B sao cho OI = $\sqrt{\frac{13}{2} }$ (với I là trung điểm của AB)
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