Question

\(1\frac{1}{9}\cdot1\frac{1}{10}\cdot1\frac{1}{11}\cdot...\cdot1\frac{1}{2011}\)

dấu chấm ở giữa kia là dấu nhân

Answer 1

1 1/9 x 1 1/10 x 1 1/11 x ... x 1 1/2011

=10/9 x 11/10 x 12/11 x ... x 2012/2011

khử

còn 2012/9

Answer 2

=\(\frac{10}{9}\)x\(\frac{11}{10}\)x\(\frac{12}{11}\)x.........x\(\frac{2012}{2011}\)

=\(\frac{2012}{9}\)

Answer 3

\(1\frac{1}{9}.1\frac{1}{10}.1\frac{1}{11}...1\frac{1}{2011}\)

= \(\frac{10}{9}.\frac{11}{10}.\frac{12}{11}...\frac{2012}{2011}\)

= \(\frac{2012}{9}\)

Answer 4

\(1\frac{1}{9}.1\frac{1}{10}.1\frac{1}{11}...1\frac{1}{2011}\)

\(=\frac{10}{9}.\frac{11}{10}.\frac{12}{11}...\frac{2012}{2011}\)

\(=\frac{2012}{9}\)