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kh3915342
2 năm trước
cho hs f(x) bằng $\frac{x^{3}}{3}$ + $\frac{x^{2}}{2}$ + x. khi đó tính tập nghiệm của bpt f'(x) $\frac{f'x}{x^{2}(2-x)}$ $\leq$ 0 A.( - vô cùng;0) ∪ (2; + vô cùng ) B.(0; cộng vô cùng ) C. ( - vô cùng;0] ∪ [2; cộng vô cùng ) D. [-2;2]
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