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nickphuhoangrin.lc
2 năm trước
Chứng minh: (-1/5)^0+(-1/5)^1+(-1/5)^2+...+(-1/5)2015 <5/6 Ai giúp e vs ạ. Thanks trc. Ai làm xong đầu tiên và chính xác sẽ đc ctlhn. Làm nhanh vs ạ em cần gấp trc 4h
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