Vũ Châu Anh
Giới thiệu về bản thân
Hello! I'am Ch.anh
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2022-05-23 18:13:47
A
2022-04-15 22:23:14
6) \(A=\dfrac{1}{1.2}+\dfrac{1}{2.3}+\dfrac{1}{3.4}+\dfrac{1}{4.5}+\dfrac{1}{5.6}+\dfrac{1}{6.7}+\dfrac{1}{7.8}+\dfrac{1}{8.9}+\dfrac{1}{9.10}\)
\(A=\dfrac{1}{1}-\dfrac{1}{2}+\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{3}-\dfrac{1}{4}+\dfrac{1}{4}-\dfrac{1}{5}+\dfrac{1}{5}-\dfrac{1}{6}+\dfrac{1}{6}-\dfrac{1}{7}+\dfrac{1}{7}-\dfrac{1}{8}+\dfrac{1}{8}-\dfrac{1}{9}+\dfrac{1}{9}-\dfrac{1}{10}\)
\(A=\dfrac{1}{1}+0+0+0+0+0+0+0+0-\dfrac{1}{10}\)
\(A=\dfrac{1}{1}-\dfrac{1}{10}\)
\(A=\dfrac{10}{10}-\dfrac{1}{10}\)
\(A=\dfrac{9}{10}\)
2022-04-15 22:12:39
B
2022-04-15 22:08:21
