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teiichi123
2 năm trước
Cho bất phương trình (m-2)x ²+2(4-3m)x+10m-11 ≤0 (1) . Gọi S là tập hợp các số nguyên dương m để bất phương trình đúng với mọi ∀x < -4> Khi đó số phần tử của S là A.3 B.2 C.0 D.1
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