M
mysmile_1506_93


tinh gioi han:
[tex]\huge \lim_{x\to 1}(\frac{m}{1-x^m}-\frac{n}{1-x^n})[/tex]
[tex]\huge \lim_{x\to 1}(\frac{m}{1-x^m}-\frac{n}{1-x^n})[/tex]
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