I) TÍNH TỔNG
A = \(\frac{1}{3.10}\)+ \(\frac{1}{10.17}\)+ \(\frac{1}{17.24}\)+ ... + \(\frac{1}{73.80}\)- \(\frac{1}{2.9}-\frac{1}{9.16}-\frac{1}{16.23}-\frac{1}{23.30}\)
B = \(\frac{1}{1.3}-\frac{1}{2.4}+\frac{1}{3.5}-\frac{1}{4.6}+...+\frac{1}{97.99}-\frac{1}{98.100}\)
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