Tính:\({\rm{G}} = 1\dfrac{1}{{20}} \times 1\dfrac{1}{{21}} \times 1\dfrac{1}{{22}} \times 1\dfrac{1}{{23}} \times
Tính:
\({\rm{G}} = 1\dfrac{1}{{20}} \times 1\dfrac{1}{{21}} \times 1\dfrac{1}{{22}} \times 1\dfrac{1}{{23}} \times \ldots \times 1\dfrac{1}{{2012}} \times 1\dfrac{1}{{2013}}\)
\({\rm{G}} = 1\dfrac{1}{{20}} \times 1\dfrac{1}{{21}} \times 1\dfrac{1}{{22}} \times 1\dfrac{1}{{23}} \times \ldots \times 1\dfrac{1}{{2012}} \times 1\dfrac{1}{{2013}}\)
\({\rm{G}} = \dfrac{{21}}{{20}} \times \dfrac{{22}}{{21}} \times \dfrac{{23}}{{22}} \times \dfrac{{24}}{{23}} \times \ldots \times \dfrac{{2013}}{{2012}} \times \dfrac{{2014}}{{2013}}\)
\({\rm{G}} = \dfrac{{2014}}{{20}} = \dfrac{{1007}}{{10}}\)
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