Question

[NGUYỄN THỊ THANH MAI]

Rút gọn biểu thức \(A=1\frac{1}{2}\times1\frac{1}{3}\times\frac{1}{4}\times...\times1\frac{1}{2015}\)

Answer 1

[Trần Quỳnh Mai]

\(A=1\frac{1}{2}\cdot1\frac{1}{3}\cdot1\frac{1}{4}\cdot...\cdot1\frac{1}{2015}\)

\(\Rightarrow A=\frac{3}{2}\cdot\frac{4}{3}\cdot\frac{5}{4}\cdot...\cdot\frac{2016}{2015}\)

\(\Rightarrow A=\frac{3\cdot4\cdot5\cdot...\cdot2016}{2\cdot3\cdot4\cdot...\cdot2015}=\frac{2016}{2}=1008\)

Vậy A = 1008

Answer 2

[do dinh hung]

a=1008