Question

\(1\frac{1}{13}x1\frac{1}{14}x1\frac{1}{15}x......x1\frac{1}{2013}x1\frac{1}{2014}\)bài tính nhanh 

Answer 1

1 1/13x1 1/14x....x1 1/2013x1 1/2014

=14/13x15/14x....x2014/2013x2015/2014

=14x15x....x2014x2015/13x14x....x2013x2014

=2015/13

=155

Answer 2

155 nha bạn

Answer 3

\(1\frac{1}{13}.1\frac{1}{14}.1\frac{1}{15}.....1\frac{1}{2013}.1\frac{1}{2014}\)

\(=\frac{14}{13}.\frac{15}{14}.\frac{16}{15}......\frac{2014}{2013}.\frac{2015}{2014}\)

\(=\frac{14.15.16.....2014.2015}{13.14.15.....2013.2014}\)

\(=\frac{2015}{13}\)

\(=155\)

chúc bạn học tốt !!!