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ninh ngọc hà
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2024-04-25 20:20:37
(x+1)/99 + (x+2)/98 + (x+3)/97 + (x+4)/96 = -4`
Vì
Vậy
(x+1)/99 + (x+2)/98 + (x+3)/97 + (x+4)/96 = -4`
Vì
Vậy