T
thanhk12


tính:
B=[tex]\frac{6}{8}+1*\frac{6}{18}+1*\frac{6}{30}+1*...*\frac{6}{10700}+1[/tex]
B=[tex]\frac{6}{8}+1*\frac{6}{18}+1*\frac{6}{30}+1*...*\frac{6}{10700}+1[/tex]
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