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vyvy12102006
2 năm trước
Chuyên gia,HSG giúp e nhanh nhé và check các câu khác của e nhé <3 Cho x= $\sqrt[3]{\frac{-a}{2}+ {\sqrt{a^{2}/4+1/27}}}$ + $\sqrt[3]{\frac{-a}{2} - {\sqrt{a^{2}/4+1/27}}}$ CMR x ≤ $\sqrt[3]{|a|}$
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