Tìm x, \(\frac{5}{1.6} + \frac{5}{6.11} + \ldots + \frac{5}{(5x+1)(5x+6)} = \frac{2005}{2006}\)

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b) \(\frac{5}{1.6} + \frac{5}{6.11} + \ldots + \frac{5}{(5x+1)(5x+6)} = \frac{2005}{2006}\)