Ta có ; \(\frac{1}{2}.\frac{2}{3}.\frac{3}{4}.......\frac{2015}{2016}\)
\(=\frac{1.2.3......2015}{2.3.4.....2016}\)
\(=\frac{1}{2016}\)
= 1/2 x 2/3 x 3/4 x...............x 2015/2016
= quên rồi
nhớ rồi
= 1/2 x 2/3 x 3/4 x.......x2015/016
=1x2x3x........x2015
------------------------------
2x3x4x.............x2016
=1/2016
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