Question

thực hiện phép tính: 1/2.3 + 1/3.4 + 1/4.5 + ... + 1/95.96

Answer 1

\(A=\frac{1}{2.3}+\frac{1}{3.4}+...+\frac{1}{95.96}\)

\(=\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+...+\frac{1}{95}-\frac{1}{96}\)

\(=\frac{1}{2}-\frac{1}{96}\)

\(=\frac{47}{96}\)

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Answer 2

47\996

hok tốt

Answer 3

\(\frac{1}{2\cdot3}+\frac{1}{3\cdot4}+\frac{1}{4\cdot5}+...+\frac{1}{95\cdot96}\)

\(=\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+\frac{1}{4}-\frac{1}{5}+...+\frac{1}{95}-\frac{1}{96}\)

\(=\frac{1}{2}-\frac{1}{96}\)

\(=\frac{47}{96}\)

Answer 4

mlem mlem >>: , số ko đẹp lắm ad ạ 

\(\frac{1}{2.3}+\frac{1}{3.4}+\frac{1}{4.5}+...+\frac{1}{95.96}\)

\(=\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+\frac{1}{4}-\frac{1}{5}+ ...+\frac{1}{95}-\frac{1}{96}\)

\(=\frac{1}{2}-\frac{1}{96}=\frac{47}{96}\)