(1-1/3)(1-1/4)(1-1/5)(1-1/6)....(1-t/2015)(1-t/2016) =n-2013/2016 Nilai n adalah

(1-1/3)(1-1/4)(1-1/5)(1-1/6)....(1-t/2015)(1-t/2016)
=2/3 × 3/4 × 4/5 × 5/6 ×....×2014/2015 × 2015/2016

setiap urutan bisa dicoret 2/3 × 3/4 coret 3 nya dst akhirnya jadi

2/2016=2015/2016 -2013/2016

shg n = 2015/2016