Question

[Mai Hoàng Ánh]

A=(1-\(\frac{1}{2}\))x(1-\(\frac{1}{3}\))x(1- \(\frac{1}{4}\) )x....x(1-\(\frac{1}{2014}\) )x(1-\(\frac{1}{2015}\) )

A=

Nhập phân số tối giản

Answer 1

[Ninh Thế Quang Nhật]

\(A=\left(1-\frac{1}{2}\right)\left(1-\frac{1}{3}\right)\left(1-\frac{1}{4}\right)....\left(1-\frac{1}{2015}\right)\)

\(=\left(\frac{2-1}{2}\right)\left(\frac{3-1}{3}\right)\left(\frac{4-1}{4}\right)....\left(\frac{2015-1}{2015}\right)\)

\(=\frac{1}{2}.\frac{2}{3}.\frac{3}{4}.....\frac{2013}{2014}.\frac{2014}{2015}\)

\(=\frac{1}{2015}\)

Answer 2

[Bùi Quỳnh Anh]

Kết quả bằng 1/2015 nhé.